tough chemistry calculation question

[Smooth Operater]

If all of the chloride in 5.0 g sample of an unknown metal chloride is precipitated as AgCl with 70.9 mL of 0.201 M AgNO3, what is the % of chloride in the sample?

a. 50.55 %
b. 20.22 %
c. 1.43 %
d. 10.10 %
e. none of above.

What is the correct answer. I belive the one on Barron is wrong. THANKS!

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[dat_student]

If all of the chloride in 5.0 g sample of an unknown metal chloride is precipitated as AgCl with 70.9 mL of 0.201 M AgNO3, what is the % of chloride in the sample?

a. 50.55 %
b. 20.22 %
c. 1.43 %
d. 10.10 %
e. none of above.

What is the correct answer. I belive the one on Barron is wrong. THANKS!

d. 10.10%

70.9 * 10^-3 * 0.201 * 35.5 = 0.5059 g CL

0.5059 / 5 = ~10%

double check my math

bb in 30-60 min (supermarket)

 

[Smooth Operater]

should you multiplying the molar mass of AgCl ?

 

[dat_student]

should you multiplying the molar mass of AgCl ?

I don't understand your question

 

[GRAD]

no i think hes right - it says in the sample, so you multiply by cl only

 

[Smooth Operater]

nvm, i think where i made the mistake. thanks

 

[HenryH]

Where did the 10^3 come from? Is this a "conventional" type of chemistry problem?

 

[fancymylotus]

Where did the 10^3 come from? Is this a "conventional" type of chemistry problem?

convert to L from mL