Monday
April 21, 2014

Homework Help: chemistry (Pls Bob check for me)

Posted by Fai on Sunday, February 24, 2013 at 4:09pm.

A 1.2g mixture of na2c03 and k2c03 was dissolved in water to form 100cm3 of s solution, 20cm3 of this solution required 40cm3 of 0.1N hcl for neutralization. Calculate the wieght of na2c03 and k2c03 in the mixture
The answer 0.4G
My own calculation:
na2c03 weight = 106g/2 = 53g/equiv
k2c03 weight = 138g/2 = 69g/equiv
x/53 na2c03 in 100ml
y/69 k2c03
0.04L x 0.1N = 0.004
x/53 + y/69 = 0.004
0.01886x + 0.014492(1.2g- x) = 0.004
0.01886x + 0.0173904 - 0.014492x = 0.004
0.01886x-0.01449x = 0.0173904 - 0.004
0.00437x = 0.01339
x =3 x 20/100
x = 0.612g
And then 1-0.612g
the answer = 0.4G

Bob check my answer.

Thank you for Bob

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chem - a mixture of 50g of S & 1x10^2g of Cl2 reacts completely to form S2Cl2 &...
Chemistry - Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to ...
math Steve for your help - 3.2g of a mixture of kn03 and nan03 was heated to ...
chemistry - A 5 liter vessel contains 2g of hydrogen and 28g of nitrogen at 27c...
chemistry (Pls Bob check for me) - A 0.5g of fuming h2so4 oleum is diluted with ...
chemistry 1st year - A 5 liter vessel contains 2g of hydrogen and 28g of ...
chemistry - What volume does a mixture of 14.2g of helium and 21.6g of hydrogen ...
Chemistry :'( - (d) Which of the following sets of quantum numbers is not ...
chem - a mixture of NaBr & NaCl has a mass of 2g & found to contain 0.75g of Na...
Chemistry 2 - A mixture containing KCLO3, K2CO3, KHCO3, and KCL was heated, ...

Search
Members