July 23, 2014

Homework Help: CHEMISTRY

Posted by albee on Thursday, April 29, 2010 at 1:34pm.

I used 10mL of unknown NaCl-NaBr mixture titrate with 0.10M silver nitrate solution.
10.15mL of silver nitrate solution is used.

the conc. of NaCl-NaBr mixture is 8g/dm3

I need to calculate the % composition of the NaCl-NaBr mixture.

I used the following calculation steps but i can't get the ans.

a + b = c......(1), where c is the weight of the mixture used, consisting a gram of NaCl and b gram of NaBr.

c= 8g x 10/1000 = 0.08g

no of moles of Cl react= a/58.44
no of moles of Br react= b/102.9
no of moles of Ag react=(0.1 x 10.15)/1000= total no of moles of Cl and Br react=a/58.44 + b/102.9
therefore, (0.1 x 10.15)/1000=a/58.44 + b/102.9.....(2)

values of a and b should easily be found by solving equation (1) and (2), however I am fail to do so.

What's wrong with my calculation?!?!

Answer this Question

First Name:
School Subject:

Related Questions

chemistry - I used 10mL of unknown NaCl-NaBr mixture titrate with 0.10M silver ...
Chemistry - Science - A 6.70 g sample of a binary mixture of silver (I) nitrate...
chem - a 6.54 g sample consisting of a mixture of silver nitrate and sodium ...
Chemistry - A mixture contains only CuCl2 and FeCl3. A 0.7391 g sample of the ...
Science- chemistry - fuzzy silver coating is impure silver. it can be converted ...
chem - A chemistry lab experiment requires 33.3 g of silver nitrate. How many ...
Chemistry - it takes 37.50 mL of 0.152 M sodium chromate to titrate 25.00 mL of ...
Chemistry - Calculate the mass of silver nitrate, AgNO3, FW = 169.9 g/mole, ...
chemistry - A mixture of NaCl and NaBr has a mass of 2.04g and is found to ...
chemistry - An aqueous solution of silver nitrate contains 5.00 g of silver ...