Tuesday
July 22, 2014

Homework Help: chem

Posted by mocha81 on Tuesday, June 19, 2007 at 10:29am.

a 2.50g sample of hydrate of calcium sulfate losses 0.523g of water when heated. what is the mass percent of water in the hydrate and the formula for the hydrate

difference of the two masses divided by the initial mass.


I believe Adam should reconsider his answer.
mass percent water = [amount water/mass sample]*100 = (0.523/2.50)*100 = ??

For the formula of the hydrate.
mols H2O = 0.523/18.01 = ??
mols CaSO4 = (2.50 - 0.523)/molar mass CaSO4 = ??

Find the ratio of mols water to 1 mol CaSO4, then express that as CaSO4.xH2O where x is the mols H2O per 1 mol CaSO4.
Post your work if you get stuck.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - A 2.50 g sample of a hydrate of calcium sulphate losses 0.523 g of ...
chemistry - A 2.500 gram sample of hydrate of calcium sulfate loses 0.532 grams ...
chemistry - A 2.50g sample of a hydrate of calcium nitrate was heated, and only ...
Chemistry - I need help with this lab. Write the equation for the decomposition ...
chemistry - I need help with this lab. Write the equation for the decomposition...
chem - A 3.48 gram sample of sodium sulfate hydrate lost 1.35 gram of water when...
chemistry - In the experiment, a hydrate is heated to form an anhydrate. The ...
Chemistry - A 32.907-g sample of a hydrate of Au (CN)3 contains 5.406 g H2O What...
Chemistry - Washing soda is a hydrate of sodium carbonate. Its formula is Na2CO3...
chemistry - If 4.02 grams of a hydrate of magnesium sulfate loses 2.06 grams of ...

Search
Members