Moles of water per mole of \(\ce{CoCl2}\): What color would you expect to see when this student dissolves the blue residue in water at the end of the experiment? Disposed of salt within the proper receptacle, cleaned crucible, and returned all equipment to its point of origin. Sulphate, Calcium Sulphate, Barium Sulphate and also Silver Use a minimum of 2 g. This will help to reduce errors due to small lab balance inaccuracies. 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). 7H2O) Ratio (water to anhydrate): 7 to 1 3.) The goal of this experiment was to determine the product of copper (II) sulfate with iron. Occasionally we do some practical work, since I believe very strongly that physical science learning should have some real lab work to bring it alive, and also to teach things like observational skills and attention to detail. Students will perform an experiment to find the hydrate formula. Digication ePortfolio :: General Chemistry (Alexander Antonopoulos Another possibility would be to get more accurate equipment, to replicate the experiment within a dehumidified environment, and/or perform the experiment using a larger crucible (to reduce the possibility that spatter from the hydrated salt could leave the crucible). Building on previous knowledge of ions and formulas from Part One & Two are included in the Exit Ticket and the Homework. The name of this compound is "copper sulfate pentahydrate". From the masses of the water and anhydrous solid and the molar mass of the anhydrous solid (the formula of the anhydrous solid will be provided), the number of moles of water and moles of the anhydrous solid are calculated as shown below (\ref{4}, \ref{5}): \[n_{\ce{H2O}} = \frac{m_{\ce{H2O}}}{MM_{\ce{H2O}}} \label{4}\], \[n_{\text{Anhydrous Solid}} = \frac{m_{\text{Anhydrous Solid}}}{MM_{\text{Anhydrous Solid}}} \label{5}\]. Calculate the change in mass for each sample. Solutions were made up of two parts, the solute and the solvent. * Pipet This worksheet is a great follow-up to 42-Naming Hydrates. Percent Composition of a Hydrate Lab - Chemistry Classes / Ronald O. The number you found for the water replaced the x in the formula CuSO4 xH2O. Students dehydrate copper (II) sulfate pentahydrate in a crucible or evaporation dish and use their data to determine the % composition and the number of water molecules per formula unit of copper (II) sulfate. When you have completed the experiment, dissolve all your heated residues in water, put all your solids and liquids in the waste crock. 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. Question: Name Formula of Hydrates Lab Report Data and Calculations: Copper (II) sulfate hydrate Trial 1 Trial 2 19.244 20.546 24.504 27.689 Mass of crucible and cover (6) Mass of crucible, cover, sample before heating is) Mass crucible, cover, sample after heating (8) Mass of hydrate() 22.606 25.111 Mass of anhydrous solide Mass of water driven off (e) Moles of water Determined mass of anhydrous salt by subtracting the mass of the crucible and lid, from the mass of the crucible, lid, and anhydrous salt: 1.1434g, Determined mass of the water lost by subtracting the mass of the anhydrous salt, from the hydrous salt: 1.018g. Let's face it, percent composition and empirical formulas are not the most exciting concepts to teach in chemistry. Kieran Sidebotham Lab Report The lab performed required the use of quantitative and analytical analysis along with limiting reagent analysis. This lab will go in your lab book. Copper Sulfate's Water of Hydration Lab Copper Sulfate's Water of Hydration Lab: Enrichment Activity Purpose - To observe the effect of removing the "water of hydration" from hydrated copper(II) sulfate. 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.) Purpose: Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, The purpose of this experiment was to explore and evaluate the bonding properti, the percentage of water is various hydrates, (3) Determine if dehydrati, versible change, and (4) Determine the mathematical relat. Will this likely lead to a higher or lower value of \(x\) than the actual value? Heat the blue copper(II) sulfate until it has turned . 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. rev2023.5.1.43405. Also this lab was used as an opportunity to improve the ability to write lab reports and make data tables, and to provide experience with unfamiliar lab equipment. Coloring pages - Water facts, how it helps the brain, how it helps the body, ideas on drinking more water. Naming and Formulas: Simple Ionic and Covalent Compounds To learn more, see our tips on writing great answers. Instead, as seen calibration results, more of each was used. Piece of paper, NaCl (sodium chloride), water, 6 M HCL (hydrochloric acid), 0.1 M AgNO3 (silver nitrate), Mg ribbon, 6 M HCL (hydrochloric acid), CuSO4 5 H2O, 0.50g iron fillings, 0.50g of powdered sulfur, magnet, copper sulfate solution, zinc metal This water can be driven off by heat to form the anhydrous (dehydrated) ionic compound, magnesium sulfate. Introduction: heat loss to the surroundings if you using the simple 'insulated For this step, you are just changing your grams of water to moles using factor labeling. Period: 5 Experimental data may be collected with other students in introductory chemistry labs. . For each of the chemical compounds below, place a. For Part 2: Single-Displacement Reactions: For each of the four single-displacement reactions, describe what happened in each well. The introduction to this lab introduces students to h. Eat, Sleep, Exercise & Hydrate: The Importance of Taking Care of Yourself! 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. A chemical reaction is when substances (reactants) change into other substances (products). You should then decide if the compound is hygroscopic, efflorescent or neither using the change in the mass of the substance. As a result the actual completely anhydrous and will also absorb water from the air if The title says what you did. Hypothesis (answer in a complete sentence in lab book). Also, suggest some reasons why your number might be off from the true number. Period 3 Are you getting the free resources, updates, and special offers we send out every week in our teacher newsletter? On an analytical balance, weigh a pea-sized sample of each of the compounds below on separate clean and dry watch glasses. 2. When hydrates are heated, the water is released from the compound as water vapor. Save the residue and perform your calculations. Concentrations are based on how much solute is in a solvent, and is reported by the units of molarity. From this, we can calculate the ratio of salt to water (by calculating the molar and stoichiometric ratios), and the percentage of water (by mass) within the hydrated salt (by dividing the mass of the water, by the mass of the hydrated salt, then multiplying the resulting decimal by 100). 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. 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. Reasons to use this instead of removing water from a hydrateYou want to do a "trial run" of the lab before performing it with your studentsYou don't have a labYou don't have enough lab materials or che, In this lab, students will remove the water from copper (II) sulfate pentahydrate by heating and determine the empirical formula. Copper/Iron Stoichiometry PDF Experiment 4 Hydrates and Anhydrous Salts 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. Lab Report Weigh the crucible with its cover to the nearest 0.001 g. Making sure to handle the crucible and its cover with clean tongs, add about 1 g (weighed to the nearest 0.001 g) of the unknown hydrate. Materials: Tests tubes (small or medium size), watch glasses, crucible* and cover*, crucible tongs, clay triangle. left exposed for any length of time. Weigh and record the mass of the cooled crucible with its cover and content (anhydrous residue). The water present in the latter case is called water of hydration or water of crystallization. By heating a known mass of hydrated salt, evaporating the water (essentially distillation), and then comparing the mass lost to the mass of anhydrous salt left behind, we can calculate the percentage of water within the hydrated salt. Abstract: But when copper sulfate is heated (as in a fire), these weak bonds are broken and the water evaporates. (3 points) Your name and the names of any lab partners. The best answers are voted up and rise to the top, Not the answer you're looking for? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Mass a dry watch glass Add a small scoop of blue hydrate Mass the watch glass and hydrate Heat the hydrate on hot plate until all blue is gone Allow watch glass to cool Mass the watch glass and anhydrate . He weighs a clean and dry crucible with its cover and records a mass of 18.456 g. He then weighs the sample in the crucible and cover and obtains a mass of 19.566 g. He heats the sample, allows it to cool to room temperature and reweighs it to obtain a mass of 19.062 g. In the process, the samples color changed from red- burgundy to blue. Little or no prior knowledge of finding empirical formula necessary. Furthermore, the Copper Sulfate and the distilled water had to be thoroughly mixed up by shaking the test tubes. The five general types of chemical reactions are synthesis (also known as direct combination), decomposition, single replacement (also known as single displacement), double replacement (also known as double displacement), and combustion. Fill half of the flask with distilled water, add the stopper for the flask, and lightly shake the flask, until the copper sulfate pentahydrate fully dissolved. Cross), Forecasting, Time Series, and Regression (Richard T. O'Connell; Anne B. Koehler), Psychology (David G. Myers; C. Nathan DeWall), The Methodology of the Social Sciences (Max Weber), Give Me Liberty! Then use that information to write the formula of the hydrate. You will be able to easily integrated it into your Learning Management System. In this lab, the student will determine the percentage of water in the hydrate by comparing the mass of the hydrate to the mass of the anhydrous salt. 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. Natural Gas Hydrates, Fourth Edition, provides a critical reference for engineers who are new to the field. 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. Anhydrate: The compound after the water molecule has been removed. Cool (approximately 10 minutes) and get the mass of the anhydrate (white compound). Error results and analysi, The first procedure (Part 1) used heat to dehydrate the 4 hydrates and sucrose. Legal. Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower? It should be brief (aim for ten words or less) and describe the main point of the experiment or investigation. 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. The hydrate being, Nomenclature for Acids and Hydrates: Naming & Writing Formulas (Nomenclature) for Acids & Hydrates.In this lesson students are introduced to naming and writing formulas for acids and hydrates. 7. * Water This mass was taken after the substance was heated. A hot crucible looks like a cold one, avoid direct contact with the crucible, clay triangle and ring stand until you are sure they are cooled. * Cup temperature change caused by the reaction is hard to measure. Copper sulphate ; CuSO4.5H2O (NB The 5H2O is the water of hydration held in the crystal ; like you hold a tennis ball in your hand). anyhydrous salt, which forms one half of the experiment, may not be Find out the importance of drinking plenty of water and the adverse health effects of not getting enough water. Measure the mass of the empty crucible using the balance. Use crucible tongs when cleaning the crucible with concentrated nitric acid. Heated crucible with hydrated copper sulfate for 3 minutes, before increasing heat, and heating it for 5 more minutes. Honors Chemistry - You do not need to write three paragraphs for this conclusion. The reaction of Copper (II) Sulfate, CuSO4, mass of 7.0015g with 2.0095g Fe or iron powder produced a solid precipitate of copper while the solution remained the blue color. October 3, 2017 Be sure to subtract out the crucible before putting it into the proper space above. 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. Measure out between 1 and 4 grams of copper sulfate hydrate that you have crushed into the crucible. 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. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. What did your group get as the formula of the hydrate? If youve read this far, Im already grateful, but Id be even more so, if anyone could suggest where the difference between 5 and 5.18 is coming from. higher temperature change to the system. DOC Copper Sulfate's Water of Hydration Lab By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Interpreting non-statistically significant results: Do we have "no evidence" or "insufficient evidence" to reject the null? Two forms of this lab included for student differentiation. Hydrates Lab Report Final - Chemistry Exp: Explore And Evaluate Bonding The electronic scales (quite cheap) were an obvious first candidate for a source of error. * Firstly to clarify a chemical change is defined as a change resulting. The weight after cooling of the evap dish is constant. Each worksheet has a full preview available. Added deionized water to the anhydrous copper sulfate, at which point it became hydrated again, and returned to its original blue coloration. Instead you are to complete the three problems below in your lab book using what you learned from the lab. The goal of this experiment was to determine the product of copper (II) sulfate with iron. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 2. Why purchase my version of this lab? Which is very close to the actual error you find. February 29, 2016 Why purchase my version of this lab? We can also (via stochiometric and molar ratios), calculate the ratio of salt to water. * Hot plate Safety: When heating a substance in a test tube, be sure the open end of the test tube points away from yourself. Wt after: 8.22g Hows your energy level around mid-morning?This health trio bundle will give you and your students the much-needed information as to why eating breakfast, hydrating with the right liquids and sleeping well are important parts of keeping your body and well-being healthy. Is this a true hydrate? This mass was taken before the substance was heated. Accessibility StatementFor more information contact us atinfo@libretexts.org. Assumed water content: 42.6841.98 = 0.7g (!!!). Who makes the plaid blue coat Jesse stone wears in Sea Change? What did you learn? The mass was reduced to 7.58 g. What is the formula of the hydrate? The anhydrous salt could have been exposed to air prior to measurement, and reabsorbed some moisture, thus disrupting measurements. Measured mass of crucible with anhydrous copper sulfate: 37.3005g Mass of crucible, cover and solid hydrate: Mass of crucible, cover and anhydrous solid: Formula of anhydrous solid (from Instructor): Moles of \(\ce{H2O}\) present in the hydrate: Ratio of moles \(\ce{H2O}\):Anhydrous solid = \(x\): Formula of hydrate [\(\text{Anhydrous solid}\ce{*}x\ce{H2O}\)]: Did the compound(s) that appeared wet in section B lose or gain water? 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. * Salt Le Chateliers principle predicts that an addition of heat to an endothermic reaction (heat is a reactant) will shift the reaction to the right (product side). Why did DOS-based Windows require HIMEM.SYS to boot? In order to determine the formula of the hydrate, [\(\text{Anhydrous Solid}\ce{*}x\ce{H2O}\)], the number of moles of water per mole of anhydrous solid (\(x\)) will be calculated by dividing the number of moles of water by the number of moles of the anhydrous solid (Equation \ref{6}). Examine your moles of anhydrate and moles of water that you just calculated, divide each by the smaller mole amount. Weigh the samples and record the masses as final masses. They are very math intensive, and very conceptual in nature.
copper sulfate hydrate lab sources of error
We envision establishing a platform that commits to accurately representing all African immigrants. Our organization is committed to providing programs and activities that unite long-time residents and newcomers. We aim to establish a platform that enables immigrant families to get access to education, health, and equal work opportunities. AIEHI will help African immigrants to build community and improve their lives in Cambridge, Boston, and all New England areas.
copper sulfate hydrate lab sources of error
AIEHI commits to promoting cultural understanding and equal opportunities for immigrant families. We have specialized channels to create civic engagement opportunities, awareness, health, and education opportunities for African immigrants. Our mission is to make the immigrants financially stable and healthy, get access to equal resources and not feel left out. We welcome, support, and empower them to get the quality of life they deserve.
