If a student doesn't heat the hydrate long enough to remove all of the water, what effect will this have, if any, on the %water that is calculated for the copper(I) sulfate pentahydrate? O more information is needed to answer this question the calculated %water will be too low no error since the water will evaporate as the solid cools the calculated %water will be too high no error since the amount of water will be too small to be measured If the hydrate is heated too strongly and some decomposition of the solid occurs, what effect will this have, if any, on the %water that is calculated for the copper(Il) sulfate pentahydrate? the calculated %water will be too low O more information is needed to answer this question the calculated %water will be too high no error since the water is already gone when decomposition occurs no error since the sulfur oxide gases are not water and don't contribute to the

If a student doesn't heat the hydrate long enough to remove all of the water, what effect will this have, if any, on the %water that is calculated for the copper(I) sulfate pentahydrate? O more information is needed to answer this question the calculated %water will be too low no error since the water will evaporate as the solid cools the calculated %water will be too high no error since the amount of water will be too small to be measured If the hydrate is heated too strongly and some decomposition of the solid occurs, what effect will this have, if any, on the %water that is calculated for the copper(Il) sulfate pentahydrate? the calculated %water will be too low O more information is needed to answer this question the calculated %water will be too high no error since the water is already gone when decomposition occurs no error since the sulfur oxide gases are not water and don't contribute to the

Chemical Principles in the Laboratory

11th Edition

ISBN:9781305264434

Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Chapter6: Properties Of Hydrates

Section: Chapter Questions

Problem 1ASA: A student is given a sample of a pink manganese (II) chloride hydrate. She weighs the sample in a...

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A student is given a sample of a pink manganese (II) chloride hydrate. She weighs the sample in a dry, covered crucible and obtains a mass of 26.742g for the crucible, cover, and sample. Earlier she had found that the crucible and cover weighed 23.599g. She then heats the crucible to drive off the water of hydration, keeping the crucible at red heat for about 10 minutes with the cover slightly ajar. She then lets the crucible cool and finds it has a lower mass; the crucible, cover and contents then weigh 25.598g. In the process the sample was converted to off-white anhydrous MnCl2. a. What was the mass of the hydrate sample? _ghydrate b. What is the mass of the anhydrous MnCl2? _gMnCl2 c. How much water was driven off? _gH2O d. What is the percent by mass of water in the hydrate? water=massofwaterinsamplemassofhydrateinsample100 _massH2O e. How many grams of water would there be in 100.0g hydrate? How many moles? _gH2O; _molesH2O f. How many grams of MnCl2 are there in 100.0g hydrate? How many moles? What percentage of the hydrate is MnCl2? Convert the mass of MnCl2 to moles. The molar mass of MnCl2 is 125.85g/mol. _gMnCl2; _molesMnCl2 g. How many moles of water are present per mole MnCl2? _ h. What is the formula of the hydrate? _
A student was given an unknown hydrate, which could be one of threepossibilities: magnesium sulfate heptahydrate, sodium dichromate tetrahydrate orbarium chloride dihydrate. Using the following data identify the unknown.Wt. of crucible/lid empty 39.46 gWt. of crucible/lid/hydrate sample 46.84 gWt. of crucible/lid/sample after heating 45.77 g
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