Homework Help: Chemistry

Posted by Amy~ on Thursday, August 26, 2010 at 10:36pm.

What would be the steps to solving this problem?

The aluminum sulfate hydrate [Al2(SO4)3 (times) xH2O] contains 8.20 % Al by mass. Calculate x, that is , the number of water molecules associated with each Al2(SO4)3 unit.

Chemistry - MathMate, Thursday, August 26, 2010 at 11:29pm
RMM for Al2(SO4)3
=27*2+(32+4*16)*3
=342
RMM for H2O
=2+16
=18
Number of water molecules = n
Thus
27*2/(342+18n)=0.082
Solve for n to get 18 (to 2 signinficant digits).
Chemistry - Amy~, Thursday, August 26, 2010 at 11:43pm
Thank You so much!
I have some other questions that I don't understand.

Answer this Question

Related Questions

chemistry - A sample of aluminum sulfate 18-hydrate, Al2(SO4)3 · 18 H2O, ...
Chemistry - How many grams of aluminum sulfate, Al2( SO4)3 , will be formed from...
science - I need help to find the answer to this problem: The formula for ...
chemistry - Aluminum sulfate reacts with sulfuric acid to produce aluminum ...
Chemistry - Use the equation below to answer the following questions. Al + H2SO4...
chemistry hw help please ASAP - if 25.2 g of aluminum (AW=27.0) are mixed with ...
Chemistry - 2Al + 3CuSO4 --> + 3Cu + Al2(SO4)3 * copper(II) sulphate is a...
chem - Aluminum hydroxide and sulfuric acid neutralize to make water and ...
science (chem) - consider the fo9rmula for Al2(SO4)3,which is used in ...
Chemistry - What is the molarity of a solution made by dissolving 32.654 g of ...

For Further Reading

First Name:
School Subject:
Answer: