Hello, im currenlty stugguling with my chem lab report. Id apprecatie some help

Question

Hello, im currenlty stugguling with my chem lab report. Id apprecatie some help please. Thanks.

T-LAB ESTIONS Name I. What will be the effect on the mass of the MSH sample of a. Overheating the MSH hydrate so the compound decomposes. Will this likely lead to a higher or lower b. Not heating enough the MSII hydrate to drive off all the water of hydration in the MSH. will this ikely lead to a higher or lower coefficient value on the water of hydrations? 2. What is meant by "heating to constant mass, and why is impotant? 3. An inn("I) sulfate hydrate is 18 4% water, what is The formula orhe hydrate, wht r) te marne ofthe hylrale? 4· The hydrate of ionic compound X has a molar mass of 1241 ghol and 43.56% water, mass of X: what is the molar

Explanation / Answer

1.

Consider a Metal sulfate Hydrate (MSH) represented by a general formula: MSO4.xH2O where x is the coefficient of hydration

x = moles of water driven off by heating/ moles of anhydrous sulfate remaining

a) When the sample MSH is overheated it tends to decompose, i.e it will no longer remain as a sulfate. As a result the mass (moles) of the anhydrous sulfate will be lower and the corresponding water driven off would be higher, giving a value of x higher than expected.

b) When the sample is not heated enough, this implies that the sulfate still retains some water i.e mass (moles) of the anhydrous sulfate is higher while the water driven off would be lower, giving a value of x lower than expected.

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