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

No one has answered this question yet.

Answer this Question

Related Questions

chemistry - 0.50g of a mixture of K2c03 and Li2c03 requires 30ml of a 0.25N hcl ...
chemistry - 0.50g of mixture of k2c03 and li2c03 requires 30ml of a 0.25N HCL ...
Chemistry - The solubility of benzoic acid in water is 2.56g in 100cm3 at 79 C ...
chemistry - 8.058g x 10-2 kg of washing soda na2co3 10h20 is dissolved in water ...
chem - a mixture of 50g of S & 1x10^2g of Cl2 reacts completely to form ...
Chemistry - A mixture of C3H8 and C2H2 has a mass of 2.0g . It is burned in ...
Gen. Chemistry - A 0.887 g sample of a mixture of NaCl and KCl is dissolved in ...
chemistry - Ca(OH)^2 does not completely dissociate. It only partially ...
Human and Social Biology - A calorimeter was used to oxidise completely 2g of a ...
Chemistry - Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to ...

For Further Reading

First Name:
School Subject:
Answer: