Hypothesis (answer in a complete sentence in lab book). As such, there is always the possibility of inaccuracies with measurement, perception of measurement, inaccuracies of equipment, and other such errors. ), During heating, some of the hydrous salt may have spattered, thus removing a portion of the hydrous salt from the crucible (A more likely source of error, considering that this would result in a greater difference between the two ratios, and percentages. Is this a true hydrate? However, I understand that sharing information required for a lab report or unknown submission (including but not limited to word processing or spreadsheet files, calculations, graphs, conclusions and additional problems at the end of the lab report) with other students is, evaporating dish, Bunsen burner, wood splint, test tubes, micro spatula, dropper, mortar and pestle, test tube holder, safety goggles, lab apron. Chemistry Experiment # _____ Percent of Water in Copper II Sulfate Pentahydrate Name_____ Section_____Date_____ Name(s) of Lab Partner(s) . Measure out between 1 and 4 grams of copper sulfate hydrate that you have crushed into the crucible. Weigh and record the mass of the cooled crucible with its cover and content (anhydrous residue). Copper Sulfate absorbs water easily, forming a weak bond between the copper sulfate and five water molecules. I can also customize anything you've already purchased.Check out some of my other work!Atomic StructureIonic CompoundsNomenclatureGeneral ChemistryScientific Method, End your nomenclature unit with a lab! To subscribe to this RSS feed, copy and paste this URL into your RSS reader. There is an example problem included. Source: Royal Society of Chemistry. Will this likely lead to a higher or lower value of \(x\) than the actual value. * Milk Use this tool to record your data and then watch all the necessary calculations and analysis completed in seconds!This resource accompanies the lab handout/procedure here. After heating, the mass of the anhydrous compound is found to be 3.22 g. Determine the formula of the hydrate and then write out the name of the hydrate. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 1 A student is given a cobalt (II) chloride hydrate. Insufficient stirring, so that not all the solid is sulphate, calcium sulphate and lead sulphate. They are typically named by stating the name of the anhydrous component followed by the Greek prefix specifying the number of moles of water present then the word hydrate (example: \(\ce{MgSO4*7H2O}\): magnesium sulfate heptahydrate). If a CHEM Do Eric benet and Lisa bonet have a child together? Water adheres to the dish when the dish is at room temperature. This means that the formula for hydrated copper sulfate is: The goal of this experiment is to determine the percentage of water (by mass) in a hydrate, and to calculate the ratio of salt to water in a hydrated salt. or iron(III) compounds, when exposed to air. Crush the copper sulfate hydrate (blue compound) using a mortar and pestle. The mass of water evaporated is obtained by subtracting the mass of the anhydrous solid from the mass of the original hydrate . Center the crucibles cover and let it cool down to room temperature. When you get this mass remember it includes the mass of the crucible so you need to subtract the mass of the crucible from the total mass. Cool (approximately 10 minutes) and get the mass of the anhydrate (white compound). Why purchase my version of this lab? Are you getting the free resources, updates, and special offers we send out every week in our teacher newsletter? Paragraph #1: Purpose and a brief description of what you did. anyhydrous salt, which forms one half of the experiment, may not be Purpose: To observe the difference between chemical and physical changes. Learn more about Stack Overflow the company, and our products. Introduction - Hydrated Ionic Compounds, commonly called, "hydrates". Period 3 The solvent was the dissolving substance and the solute was the substance being dissolved. In other words, the chemical equation BaCl2 + 2H2O (s) BaCl2 + 2H2O (g), labeled as 5.3 in the original lab report, is best used to describe the transition which took place during this portion of the lab. Placed crucible on mesh pad using tongs (from this point, the crucible was handled solely with tongs until the experiment concluded), and allowed to cool to room temperature. Procedure Weigh out approximately 5g of copper sulfate pentahydrate. Also as I was calculating the empirical formula, I wasn't quite sure the figures were correct so I might have miscalculated. O. Place the crucible on the triangle and ring stand over the bunsen burner and heat until it turns white. Does a password policy with a restriction of repeated characters increase security? We would call this copper sulfate pentahydrate. Heat the test tube and note any condensation that may appear at the mouth of the test tube as evidence of dehydration, note the color of the residue. Use MathJax to format equations. Digication ePortfolio :: General Chemistry (Alexander Antonopoulos Heating will shift the equation of dehydration below to the right since it is an endothermic reaction. This means, This lesson plan assists elementary students in understanding why it is important to drink plenty of water. Calculate the change in mass for each sample. So iron(II) sulphate Determining which hydrate of calcium chloride I have? In this experiment, the percentage by mass of sulfate in an unknown sulfate salt will be determined by gravimetric analysis. Hydrate: A compound that contains the water molecule. Introduction to Formulas (FREE) has a mass of 4.31 g before heating. Legal. Your name and the names of any lab partners. Lab written for Hotplate or Bunsen burner.Students: Observe water leaving compound as steam Heat to constant mass Calculate percent water Re-hydrate the anhydrous compoundLab Contains: Student Lab Sh, This lab is a great way for your students to investigate what a hydrate is and how its formula is determined. 2021-22, PDF Mark K Nclex Study Guide: Outline format for 2021 NCLEX exam. $0.08$ g. Now plugging in the numbers in Eq.$(3)$ I find $\Delta X=0.14$ mol water per mol copper sulphate. How many moles of water (x) do you think are in this hydrate? Adding EV Charger (100A) in secondary panel (100A) fed off main (200A). Abstract Why don't we use the 7805 for car phone chargers? The actual percent is ____. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. On an analytical balance, weigh a pea-sized sample of each of the compounds below on separate clean and dry watch glasses. Tina Jones Heent Interview Completed Shadow Health 1, Test Bank Varcarolis Essentials of Psychiatric Mental Health Nursing 3e 2017, 1-2 Module One Activity Project topic exploration, (Ybaez, Alcy B.) The formula of a hydrate can be determined by dehydrating a known mass of the hydrate, then comparing the masses of the original hydrate and the resulting anhydrous solid. Purposive Communication Module 2, Leadership class , week 3 executive summary, I am doing my essay on the Ted Talk titaled How One Photo Captured a Humanitie Crisis https, School-Plan - School Plan of San Juan Integrated School, SEC-502-RS-Dispositions Self-Assessment Survey T3 (1), Techniques DE Separation ET Analyse EN Biochimi 1. which works out to: * Iodine Also, suggest some reasons why your number might be off from the true number. For example, if a given amount of hydrated copper(II) sulfate gave off 0.060 mole of H 2 O and left behind 0.012 mole of anhydrous copper(II) sulfate, CuSO 4, then the ratio of H 2 O to CuSO 4 is 5:1, and the formula would be written as CuSO 4 5H 2 O. Pre-made digital activities. At that time, the copper sulfate had turned a yellowish-white. Covering the fundamental properties, thermodynamics and behavior of hydrates in multiphase systems, this reference explains the basics before advancing to more practical applications, the latest developments and models. 10/3/12 Find out the importance of drinking plenty of water and the adverse health effects of not getting enough water. Hence 0.267/0.0515 = 5.18mol water per mol copper sulphate. When it is all white the water has been removed and the anhydrate is left. Three different versions! The salt is magnesium sulfate - MgSO 4 and, the same as Copper sulfate, it exists as a hydrate, but in this case we will find the amount of water surrounding the compound. Copper sulfate water of hydration lab and answer sheet and question Grace Timler If a chemical reaction occurred, write a balanced equation for it. Copper/Iron Stoichiometry Grace Timler AB1 October 3, 2017 Abstract The techniques used in this lab are quantitative transfer and vacuum filtration with the reaction of 8.001 grams of copper (II) sulfate, CuSO4, and 2.0153 grams of iron powder, Fe. Thanks for contributing an answer to Chemistry Stack Exchange! Pour the used nitric acid in the waste container provided. Kieran Sidebotham Rounded to the nearest integer, the ratio is 1:5. 1. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. This water can be driven off by heat to form the anhydrous (dehydrated) ionic compound, magnesium sulfate. What is wrong with reporter Susan Raff's arm on WFSB news? Making statements based on opinion; back them up with references or personal experience. This compound is not dissolved in water, the water is part of the formula and is a solid. Introduction: First, it is so easy to set upnot much prep at all. For example, because for Trial 1 there was not exactly 2 mL of Copper Sulfate and 8 mL of distilled water, the concentration of the solution definitely could not be 0.080M. AB1 Our goal is to determine this value by comparing the moles of copper sulfate (anhydrate) to the moles of water. To participate in this lab it is, that there was no release of acidic vapors during the separating of the water and compound bonds. Each worksheet has a full preview available. Ms. Macielag's Thursday Lab Class (Honors), Building and Identifying All Organic Compounds, Lab Book: Setting Up Graphing Reference Sections, Naming and Writing Formulas (without Formula Mass). To determine the mass of the water, subtract the anhydrate from the hydrate and put it in the proper space above. So the practical involved taking hydrated copper sulphate, heating it to drive off the water, weighing before and after, and thus calculating the number of water molecules of crystallisation, based on the respective molecular weights of the anhydrous salt and water. temperature change caused by the reaction is hard to measure. Then I re-weighed. Other hygroscopic substances, such as solid \(\ce{NaOH}\), absorb so much water from the atmosphere that they dissolve in this water, these substances are said to be deliquescent. PDF Experiment 4 Hydrates and Anhydrous Salts The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. If the correct formula of copper sulfate is CuSO4.5H20, determine your percent error. Materials: Crucible and lid (or use aluminum foil if you don't trust children to drop the lids), electronic balances, bunsen burners, tongs, strikers, clay triangles, ring stand and ring. If the results of your calculations suggest that you have some water left in the residue, reheat your sample for an additional 5 minutes, allow it to cool down and weigh it again. The actual value of moles of water per copper sulfate is 5 moles and the percent composition of water in copper sulfate pentahydrate is 36.1% Variables: Independent Variable: Mass of crucible, cover and hydrated sample in grams Dependent Variable: Mass of water evolved in grams Experiment_605_Hydrates_1_2_1 - Chemistry LibreTexts 7H 2 O) is a heptahydrate of magnesium sulfate: within one mole of magnesium sulfate heptahydrate are seven moles of water. As a result the actual Students will perform an experiment to find the hydrate formula. Be sure to subtract out the crucible before putting it into the proper space above. In this section we will determine the number of moles of water present per mole of anhydrous solid in a given hydrate. Is it safe to publish research papers in cooperation with Russian academics? Heat the blue copper(II) sulfate until it has turned . Delsea Chemistry - Hydrate Lab Finding the formula of hydrated copper(II) sulfate | Experiment | RSC Education In this experiment students will measure the mass of hydrated copper(II) sulfate before and after heating and use mole calculations to find the formula. * Phenolphthalein Label and place all samples at the same location in the room, well out of the way so they wont be spilled. (DOC) Chemistry Lab Report-Determining the Empirical Formula of a Solved Post-Lab Questions 1. If the correct formula of - Chegg This water can be driven off by heat to form the anhydrous (dehydrated) ionic compound, magnesium sulfate. A substance is classified as efflorescent if its mass decreases by 0.005 g or more; and it is classified as hygroscopic if its mass increases by 0.005 g or more. Then reheat the solution to dryness. Have you ever wondered why you get a lot of headaches, your muscle doesnt function as well and your immune system is low? What did you learn? They are very math intensive, and very conceptual in nature. You can check for this by looking for the telltale brown/black color of copper oxide. All rights reserved. What's the cheapest way to buy out a sibling's share of our parents house if I have no cash and want to pay less than the appraised value? Still working on that - I'm going to leave a sample fresh from the bottle in a warm cupboard overnight tonight, and see if it gets any lighter. Be sure that the flame will be close enough to the triangle to engulf the entire crucible. Lab Report Or the hydrate, as supplied, could be a little wet. Given that water has a much lower boiling point than copper sulfate, I hypothesize thatwe can heat it to remove the water, and then calculate the mass that was lost, based on measurements made before and after the water was evaporated. Paragraph #3: An error and how to fix it. Given the data presented above, findings showed the experimental percentage of water within the hydrated salt to be: 47.10%, The accepted percentage of water within hydrated copper sulfate is:36.07%, As such, the percent error within this measurement is30.57%, The experimental stoichiometric ratio between copper sulfate and water was found to be: 1:5.314, The accepted stoichiometric ratio between copper sulfate and water is: 1:5, The percent error within this measurement is 5.909%. Do you perhaps have any information about the nature of the .6% impurities in the original sample? I havent investigated that yet, but I plan to weigh a sample before and after leaving in a warm airing cupboard overnight. Accessibility StatementFor more information contact us atinfo@libretexts.org. The weight after cooling of the evap dish is constant. For each of the chemical compounds below, place a. You might also like these related lessons! > A C @ 6 bjbjWW 9n 5 5 r. How to force Unity Editor/TestRunner to run at full speed when in background? The experiment was about creating solutions of standard molarity and measuring concentrations. * Cup When you would go to mass the anhydrous salt, some of the mass would be missing as it would be in the air. Rounding out with new case study examples, this new edition gives engineers an im, This PowerPoint is intended to introduce high school students formulas of hydrates. The purpose of this lab is to determine the relationship between moles of copper sulfate and moles of water in a hydrate. A student trying to determine if a white solid is a true hydrate heats the sample and finds that there is evolution of water, that the residue obtained is soluble in water and that the solution is colorless. MIP Model with relaxed integer constraints takes longer to solve than normal model, why? Score dissolved is another. $$\Delta X=\sqrt{\left(\frac{\partial X}{\partial W_0}\Delta W_0\right)^2+\left(\frac{\partial X}{\partial W_e}\Delta W_e\right)^2} \tag{2}$$ Excellent layout. A 15.67 g sample of a hydrate of magnesium carbonate was heated, without decomposing the carbonate, to drive off the water. Ammonium sulphide. Solids: Nickel (II) chloride, Cobalt (II) chloride, Sucrose, Calcium Carbonate, Barium chloride, Sodium tetraborate, Potassium chloride, Sodium sulfate hydrate, Iron (III) chloride, Potassium aluminum sulfate, Calcium chloride, Copper sulfate, Unknown. When this anhydrous compound is dissolved in water it will go back to the original red burgundy color. Hydrates Lab Report introduction the purpose of this experiment was to explore and evaluate the bonding properties and characteristics of hydrates. Some chemicals, when exposed to water in the atmosphere, will reversibly either adsorb it onto their surface or include it in their structure forming a complex in which water generally bonds with the cation in ionic substances. Some compounds like carbohydrates release water upon heating by decomposition of the compound rather than by loss of the water of hydration. The best answers are voted up and rise to the top, Not the answer you're looking for? It is soluble. Easel assessment included with this lesson plan.CDC HEALTH STANDARD SEVEN: Students will demonstrate the ability to practice health enhancing behaviors and to avoid or re, 9 worksheets to practice naming and writing formulas for ionic and covalent compounds, including acids and hydrates. The purpose of the flame test lab was to further study the process of electron excitation. What did your group get as the formula of the hydrate? -Bunsen burner Weigh out approximately 3 grams of copper(II) sulfate pentahydrate into a clean, dry large ignition tube (25 x 200 mm). It should be brief (aim for ten words or less) and describe the main point of the experiment or investigation. Record the mass of the crucible, cover and sample. October 3, 2017 Explain what may have happened. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in, In this lab a number of small experiments were conducted in order to observe the reactions of the materials tested. February 29, 2016 Using crucible tongs, clean a porcelain crucible and its cover using concentrated nitric acid (6 M). Copper Sulfate Pentahydrate Lab Report | ipl.org The lesson tutorial and the previous, reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. Little or no prior knowledge of finding empirical formula necessary. The technique for this lab is based on actual geochemical analysis techniq. Hydrate: A compound that contains the water molecule. In this lab, a SpectroVis was used to determine the concentration of an unknown substance. What will be the effect, on the mass of the residue, of not heating the hydrate enough to drive off all the water of hydration in the hydrate. heat loss to the surroundings if you using the simple 'insulated What's even better is that you get credit from TpT every time you leave a constructive comment. (Unlikely, considering that the ratios between the two, both stoichiometric and percent water content, would be smaller in such an instance. Im teaching chemistry to a home-ed 15 year old. The mass of water evaporated is obtained by subtracting the mass of the anhydrous solid from the mass of the original hydrate (\ref{3}): \[m_{\ce{H2O}} = m_{\text{Hydrate}} - m_{\text{Anhydrous Solid}} \label{3}\]. Pending marking your answer as accepted, my grateful thanks in the meantime for your detailed analysis. 5 H 2 O 6. Added deionized water to the anhydrous copper sulfate, at which point it became hydrated again, and returned to its original blue coloration. Students chew bubble gum to remove sugar instead of removing water from a hydrate. Determining the Empirical Formula of a Hydrate Lab Place the crucible, hydrated copper sulfate, and lid on/in your clay triangle. X is a specific whole number value. The water is present in a definite and consistent ratio. Use the information collected in lab found below to fill in the blanks for the gram amounts above: Use this picture to get the mass of the empty crucible and fill it in above. What are the sources of errors in the experiment of determine of enthalpy change of hydration of copper ii sulphate six? In this part, pea-, sized samples (1-3g) were place separately in test tubes and heated for approxim, Principles of Environmental Science (William P. Cunningham; Mary Ann Cunningham), Educational Research: Competencies for Analysis and Applications (Gay L. R.; Mills Geoffrey E.; Airasian Peter W.), Brunner and Suddarth's Textbook of Medical-Surgical Nursing (Janice L. Hinkle; Kerry H. Cheever), Campbell Biology (Jane B. Reece; Lisa A. Urry; Michael L. Cain; Steven A. Wasserman; Peter V. Minorsky), Civilization and its Discontents (Sigmund Freud), Business Law: Text and Cases (Kenneth W. Clarkson; Roger LeRoy Miller; Frank B. So you will get 1 copper sulfate and your amount of water should be larger than 1 when you divide by the smallest. * Alka-Seltzer tablet What is "water of hydration" and how does it affect me (you)? Problem #1: A 15.67 g sample of a hydrate of magnesium carbonate was heated, without decomposing the carbonate, to drive off the water. Ive compared its readings at weights of about 2, about 20, and about 50g, with another similar model, and they agree to within 10mg (one digit in the final decimal place) at all weights. Assumed water content: 42.6841.98 = 0.7g (!!!). This lab will go in your lab book. cup' method. So now the final thing left to do is estimate how big $\Delta W_0$ and $\Delta W_e$ are. We tested the different reactions of each chemical compound that we used with the flame. clip art, assessment, writing prompt, art activity, answer key, printables, no prep needed. If the compound possesses all three of the above-mentioned properties, it is a true hydrate; if at least one of them is not present, the compound is not. Hydrated copper sulfate (CuSO 4), hydrated ferrous sulfate, hydrated cobalt sulfate, sucrose, epson salt, 4 test tubes, . The residue obtained after heating, called the anhydrous compound, will have a different structure and texture and may have a different color than the hydrate. The title says what you did. Download Free PDF View PDF Conclusion The mass percent of water in copper sulfate pentahydrate is _______. Heating maybe required to provide the required activation energy. This is probably a small effect. * Paper towel Great for Teachers:See if student data is on the right track with a few clicks or copy & paste.Check if calculations and conclusions made by students are right without needing manually doing the calculations.Provide s, This unit covers:1) Percentage Composition by Mass2) Finding Empirical Mass and Formulas3) Finding Molecular Mass and Formulas of Compounds4) Student Presentations Project, with rubric5) Finding Molecular Mass and Formulas of Hydrates6) Lab Activity: Determination of a Formula of a Hydrate7) Assessments and Check for Understandings8) Re-Teach PowerPoints, Over 15 practice problems on hydrate nomenclature, naming, and formula writing, complete with a full answer key.Goes Well With My Other Nomenclature Worksheets. with an unknown hydrate to determine the mass percent of water lost and solve for the formula and name of the unknown hydrate. This lesson presumes a basic understanding of how to name and write the formulas for binary ionic compounds. There are a couple sources of error during the experiment, one would be the fact that we aren't entirely sure that the water had completely evaporated from the Copper (II) Sulfate and the Magnesium Sulfate. If, like @brinnb suggests, an additional reduction in $W_e$ could be expected due to adhered water say that the error in $W_e$ is $0.1$ g you already get to $\Delta X=0.17$ mol water per mol copper sulphate. When this color change appears to be complete, add 3 to 5 mL of water and observe the color of the dissolved substance. Copper Sulfate's Water of Hydration Lab: Enrichment Activity. The goal of this experiment was to determine the product of copper (II) sulfate with iron. 7H 2 O) is a heptahydrate of magnesium sulfate: within one mole of magnesium sulfate heptahydrate are seven moles of water. 1. I weighed out some of the hydrate into another dry dish, flattened it out as much as possible within the confines of the dish to expose as much surface area as possible, and left it in the airing cupboard for 24h at 26 degrees Celsius. Hydrated Copper (II) Sulphate Experiment Report