# chemistry

posted by .

CrCl3(s) + AgNO3 (aq)= AgCl(s) + Cr(NO3)3(aq)

A 0.750 g sample of impure CrCl3 was removed from a bottle that contained 1.75 g of impure sample. The removed sample was dissolved in water and required 42.5 mL of 0.215 M AgNO3 solution to react with the CrCl3 in the sample. What was the mass percent of CrCl3 in the sample?

• chemistry -

CrCl3 + 3AgNO3 ==> 3AgCl + Cr(NO3)3
moles AgNO3 used = M x L = ?.
moles CrCl3 = 1/3 x moles AgNO3.
g CrCl3 = mols x molar mass

%CrCl3 = (grams CrCl3/mass sample)*100 = ??
For mass sample use 0.750 for percent CrCl3 in the "removed" sample; use 1.75 if you want the percent in the original sample. The way you have the worded the problem (you have two samples) I can't tell which percent you want.

## Similar Questions

1. ### College-Chemistry

NaOH(s)+ H2SO4(aq)=Na2SO4(aq) + H2O(l) Consider the unbalanced equation above.A 0.900 g sample of impure NaOH was dissolved in water and required 37.0 mL of 0.145 M H2SO4 solution to react with the NaOH in the sample. What was the …
2. ### College Chem

Impure sample of table salt that weighed 0.8421g, when dissolved in water and treated with excess AgNO3, formed 2.044g of AgCl. What is the percentage of NaCl in the impure sample?
3. ### Chem

A 50 ml sample of 0.025M AgNo3 is mixed with 15 ml of 0.04 M CrCl3. How many grams of AgCl will precipitate?
4. ### Chemistry

A 0.4584 g sample of impure zinc chloride, ZnCl2, FW = 136.3 g/mole, was dissolved in water and excess silver nitrate was added to the solution. The mass of the dry silver chloride, AgCl, FW = 143.3 g/mole, produced was 0.8564 g. The …
5. ### chemistry

treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample?
6. ### chemistry

treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample?
7. ### chemistry

treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample?
8. ### chemistry

treatment of a 0.400g sample of impure potassium chloride with an excess of AgNO3 resulted in the formation of 0.733g of AgCl. calculate the percentage of KCl in the sample. show balanced equations in support of your answer
9. ### Chemistry

A sodium hydroxide sample is contaminated with sodium chloride. A 0.240 gram sample of this impure sample is dissolved in water and titrated with 21.50 mL of 0.130 M H2C2O4. Calculate the percent sadium hydroxide in the impure sample …
10. ### Chemistry

An impure sample containing an unknown amount of gallium bromide, GaBr3, weighs 0.379 g. It was dissolved in water and treated with silver nitrate, AgNO3, resulting in the precipitation of 0.263 g AgBr. Assuming that GaBr3 is the only …

More Similar Questions