Friday

March 6, 2015

March 6, 2015

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

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 11:29pmRMM 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 11:43pmThank 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.... - Wouldn't it be 3*0.234 instead of 2* 0.234? since....2Al3+ +...

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 - 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 ...

Chemistry - Use the equation below to answer the following questions. Al + H2SO4...

Chemistry - 2Al + 3CuSO4 --> + 3Cu + Al2(SO4)3 * copper(II) sulphate is a ...

chemistry - Aluminum sulfate reacts with sulfuric acid to produce aluminum ...

chemistry - If a 8.6195 g of a mixture which contains (20.0 % of CuSO4.XH2O and ...