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Digication ePortfolio :: General Chemistry (Alexander Antonopoulos All metal sulphate are soluble in water, except barium Given that the mass of the hydrated salt is known, it is also given that the mass lost is equivalent to the mass of the water. Why purchase my version of this lab? Is it safe to publish research papers in cooperation with Russian academics? Do you have pictures of Gracie Thompson from the movie Gracie's choice. Hydrate: A compound that contains the water molecule. Let the residue cool down (put the test tube in a beaker not on a plastic test tube rack) then try to dissolve in about 3 mL of water (about 1/3 of the small test tube), warming gently if necessary to dissolve the residue (dissolve only substances that have shown condensation). 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. Chemistry Experiment # _____ Percent of Water in Copper II Sulfate Pentahydrate Name_____ Section_____Date_____ Name(s) of Lab Partner(s) . - CLICK HERE **--------------------------------------------If you like what you see, check out the rest of my store and be sure, This hydrate lab activity is perfect for chemistry teachers without a lab room! Chem 1A 04 Lab 3 Hydrate Report - Studocu dissolved is another. * Milk Im teaching chemistry to a home-ed 15 year old. Have you ever wondered why you get a lot of headaches, your muscle doesnt function as well and your immune system is low? When you would go to mass the anhydrous salt, some of the mass would be missing as it would be in the air. The focus of this lesson is defining hydrates, the lab procedure of dehydrating a hydrate, doing percent of hydration and percent error calculations and naming hydrates. 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. which works out to: Do you perhaps have any information about the nature of the .6% impurities in the original sample? Experimental data may be collected with other students in introductory chemistry labs. Solved Post-Lab Questions 1. If the correct formula of - Chegg 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! Legal. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. . Removed crucible from burner, placed on mesh pad, and allowed to return to room temperature. The electronic scales (quite cheap) were an obvious first candidate for a source of error. A reversible reaction of hydrated copper(II) sulfate Ferrous or iron(II) compounds can easily be oxidised to ferric This worksheet is a great follow-up to 42-Naming Hydrates. Through the use of a vacuum filtration system the mass of Cu was, Flame Test Lab Report I can also customize anything you', Looking for an engaging way for your students to review nomenclature for acids, bases and hydrates? Asking for help, clarification, or responding to other answers. Copper sulfate and potassium iodide precipitate, EXAMPLE HYDRATECUPRIC SULFATE PENTAHYDRATE The coefficient of 5, Copper SourcesUses n Copper cookware n Copper pipes, Characterization of the Heparan Sulfate and Chondroitin Sulfate, Percent of Change Percent of Increase Percent of, Percent Composition What is Percent Composition The percent, Percent Proportion Equation Percent of Change Percent of, Empirical molecular percent composition Percent Composition Percent by, Percent Vpoet potu percent Vypotaj spamti koko percent. Then I re-weighed. For a compound to be a true hydrate, it has to show all properties of true hydrates, including evolution of water upon heating, solubility of its anhydrous residue in water and reversibility in the color of the residue back to the color of the hydrate when dissolved in water. Also as I was calculating the empirical formula, I wasn't quite sure the figures were correct so I might have miscalculated. The mass of water evaporated is obtained by subtracting the mass of the anhydrous solid from the mass of the original hydrate . Let's face it, percent composition and empirical formulas are not the most exciting concepts to teach in chemistry. Which is very close to the actual error you find. Set the crucible with its cover slightly open on a clay triangle and heat strongly for at least 10 minutes. Record the mass of the crucible, cover and sample. Period 3 Water adheres to the dish when the dish is at room temperature. Pending marking your answer as accepted, my grateful thanks in the meantime for your detailed analysis. Kieran Sidebotham 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 Paragraph #2: What did you learn? The equation for the decomposition of copper (II) sulfate is CuSO4 (aq) ==> SO2(g) + CuO(s). Hypothesis (answer in a complete sentence in lab book). Heating will shift the equation of dehydration below to the right since it is an endothermic reaction. 5 H2O. The number you found for the water replaced the x in the formula CuSO4 xH2O. Paragraph #1: Purpose and a brief description of what you did. Error results and analysi, The first procedure (Part 1) used heat to dehydrate the 4 hydrates and sucrose. 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. When this color change appears to be complete, add 3 to 5 mL of water and observe the color of the dissolved substance. MathJax reference. Rounded to the nearest integer, the ratio is 1:5. Instead, as seen calibration results, more of each was used. You will be able to edit the document to your needs and share it with your students. So iron(II) sulphate T, Concepts:This worksheet teaches students how to determine the number of water molecules in a hydrate. In this experiment, the percentage by mass of sulfate in an unknown sulfate salt will be determined by gravimetric analysis. However, immediately after the first heating, It can be clearly seen that the heated copper sulfate has now transformed into a grainy and whitish-gray form. I have a porcelain evaporating dish to contain the hydrate during heating, electronic scales that will weigh to 300g in increments of 10mg, and commercially bought copper sulphate that is allegedly 99.5% pure. Remember the hydrate is in the crucible so you need to subtract the mass of the crucible to get the mass of just the hydrate. Once dissolved, fill the rest of the volumetric . Lab Report Lab Report It is generally possible to remove the water of hydration by heating the hydrate. If a chemical reaction occurred, write a balanced equation for it. This resource will come to you as a Google Doc. The second procedure called for us to heat a number of other hydrates and test their vapors for any evidence of acid just as we had done in the previous experimental procedure. The experiment was about creating solutions of standard molarity and measuring concentrations. copper (II) sulfate hydrate. The purpose of this lab is to determine the relationship between moles of copper sulfate and moles of water in a hydrate. Heating on the other hand would introduce heat change and thus a { "01:_Using_Excel_for_Graphical_Analysis_of_Data_(Experiment)" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "02:_The_Densities_of_Solutions_and_Solids_(Experiment)" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "03:_Paper_Chromatography-_Separation_and_Identification_of_Five_Metal_Cations_(Experiment)" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "04:_Inorganic_Nomenclature_(Experiment)" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "05:_Properties_of_Hydrates_(Experiment)" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "06:_Types_of_Chemical_Reactions__(Experiment)" : "property get [Map 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\newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\), 6: Types of Chemical Reactions (Experiment), Formula of a Hydrate (\(\text{Anhydrous Solid}\ce{*}x\ce{H2O}\)), Part A: Reversibility of hydration (optional, by Instructor), Part B: Hygroscopic and Efflorescent Solids, Part D: Determination of the formula of a hydrate, Pre-laboratory Assignment: Properties of Hydrates, Part A: Reversibility of Hydration (Optional), Identification of hydrates in a group of compounds, Investigation of the properties of hydrates, Determination of the number moles of water of hydration in a hydrate.

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