Copper Sulfate absorbs water easily, forming a weak bond between the copper sulfate and five water molecules. There are some possible sources of experimental error for this lab The purpose of this lab is to determine the relationship between moles of copper sulfate and moles of water in a hydrate. * Copper II sulfate The reason why this is a source of error is because as time passed between the measurements, the copper sulfate hydrate sample absorbed humidity (water) from the atmosphere and therefore increased its mass. Happy teaching and have an, Students find the Empirical Formula of Epsom Salt. 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. A minor scale definition: am I missing something? 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 Your teacher's name. 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. Chemical Changes VS Physical Changes Solutions were made up of two parts, the solute and the solvent. Have you ever wondered why you get a lot of headaches, your muscle doesnt function as well and your immune system is low? (Unlikely, considering that the ratios between the two, both stoichiometric and percent water content, would be smaller in such an instance. Legal. Student exploration Graphing Skills SE Key Gizmos Explore Learning. Assumed water content: 42.6841.98 = 0.7g (!!!). 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. T, Concepts:This worksheet teaches students how to determine the number of water molecules in a hydrate. Water is trapped in an ionic jail and can only escape using heat! Interpreting non-statistically significant results: Do we have "no evidence" or "insufficient evidence" to reject the null? Your values correspond to a #38.169%# water percent composition for copper(II) sulfate pentahydrate. It contains a brief introduction to hydrates and then describes the series of calculations that are done to determine the ratio of the moles of water to anhydrate salt. Then I re-weighed. When this color change appears to be complete, add 3 to 5 mL of water and observe the color of the dissolved substance. (3 points) 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! Also, suggest some reasons why your number might be off from the true number. When hydrates are heated, the water is released from the compound as water vapor. ), Human error is always in effect, given that the laboratory does not function under ideal conditions. Im teaching chemistry to a home-ed 15 year old. Where's my experimental error coming from? If the correct formula of copper sulfate is CuSO4.5H20, determine your percent error. Measured mass of crucible with anhydrous copper sulfate: 37.3005g. (Full Name) Use crucible tongs when cleaning the crucible with concentrated nitric acid. Adding EV Charger (100A) in secondary panel (100A) fed off main (200A). 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! so with this last source of error you edited in (the 0.02 g) my estimate of $\Delta W_e=0.1$g actually seems quite realistic. Is this a true hydrate? Copper Sulfate Lab Report - 773 Words | Bartleby Two sources of error include _____. Added deionized water to the anhydrous copper sulfate, at which point it became hydrated again, and returned to its original blue coloration. In this lab, the five general types of chemical reactions were conducted and observations. 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). Other compounds can spontaneously absorb water from the surrounding atmosphere, they are said to be hygroscopic. To learn more, see our tips on writing great answers. The purpose was to see the electron excitation of each reaction and the color that it emitted. Use caution when heating the crucible and cover. Measure the mass of the empty crucible using the balance. left exposed for any length of time. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. PDF Hydrate Lab By Maya Parks 2/20/15 You will be able to edit the document to your needs and share it with your students. * Cup * Milk * Watch glass Try a color-by-number activity. So you will get 1 copper sulfate and your amount of water should be larger than 1 when you divide by the smallest. +1. completely anhydrous and will also absorb water from the air if 8.22/(63.5+32+64) = 0.0515mol anhydrous copper sulphate. 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. Why don't we use the 7805 for car phone chargers? Send me a message, I'd love to hear from you! The purpose of the flame test lab was to further study the process of electron excitation. Any anhydrous compound from a hydrate generally has the following properties: Most hydrates are stable at room temperature. 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