Q20P A solution contains 0.010聽M聽Ba... [FREE SOLUTION]

Chapter 6: Q20P (page 142)

A solution contains $0.010 M {Ba}^{2 +}$ and $0.010 M {Ag}^{2}$ . Can 99.90% of either ion be precipitated by chromate ${CrO}_{4}^{2 -}$ without precipitating the other metal ion?

Short Answer

Expert verified

Neither ${Ba}^{2 +}$ nor ${Ag}^{+}$ can be precipitated without precipitating other metal ion.

Step by step solution

Chromate Precipitate.

${BaCrO}_{4 (s)} 鈬� {Ba}^{2 +} + {CrO}_{4}^{2 -} K_{sp} = 2.1 脳 10^{- 10} {Ag}_{2} {CrO}_{4 (s)} 鈬� 2 {Ag}^{+} + {CrO}_{4}^{2 -} K_{sp} = 1.2 脳 10^{- 12}$

Since, the stoichiometry of the two salts are not same, lower $K_{sp}$ value does not indicate faster precipitation.

Suppose 99.99% of ${BaCrO}_{4}$ is precipitated, then the final concentration of ${Ba}^{+ 2}$ ions will be $\frac{0.1}{100} 脳 0.01 = 1.0 脳 10^{- 5} M$

Therefore, concentration of chromate ion present in solution :

$K_{sp} = [{Ba}^{2 +}] [{CrO}_{4}^{2 -}] 2.1 脳 10^{- 10} = 1.0 脳 10^{- 5} 脳 [{CrO}_{4}^{2 -}] [{CrO}_{4}^{2 -}] = \frac{2.1 脳 10^{- 10}}{1.0 脳 10^{- 5}} = 2.1 脳 10^{- 5}$

Reaction Quotient for Ag2CrO4 .

$Q = [{Ag}^{+}] [{CrO}_{4}^{2 -}] = {(0.010)}^{2} (2.1 脳 10^{- 5}) = 2.1 脳 10^{- 9}$

Since, $Q > K_{sp}$ for ${Ag}_{2} {CrO}_{4}, {Ag}^{+}$ should precipitate.

Therefore, it is not possible to separate both the salts by precipitation.

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A solution contains $0.010 M {Ba}^{2 +}$ and $0.010 M {Ag}^{2}$ . Can 99.90% of either ion be precipitated by chromate ${CrO}_{4}^{2 -}$ without precipitating the other metal ion?

Short Answer

Step by step solution

Chromate Precipitate.

Reaction Quotient for Ag2CrO4 .

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91影视

A solution contains 0.010MBa2+and 0.010MAg2. Can 99.90% of either ion be precipitated by chromate CrO42-without precipitating the other metal ion?

Short Answer

Step by step solution

Chromate Precipitate.

Reaction Quotient for Ag2CrO4 .

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Inorganic Chemistry

Kinetics

Chemical Analysis

Chemical Reactions

Chemistry Branches

Ionic and Molecular Compounds

Study anywhere. Anytime. Across all devices.

A solution contains $0.010 M {Ba}^{2 +}$ and $0.010 M {Ag}^{2}$ . Can 99.90% of either ion be precipitated by chromate ${CrO}_{4}^{2 -}$ without precipitating the other metal ion?