Q: If the $$K_{sp}$$ for AgOH is $$1.5 \times 10$$^{-8}$$, what is the molar solubility (S$) of AgOH in pure water?

$$S = \sqrt{K_{sp}} = 3.9 \times 10$$^{-5}$$ M

Question 1

When sodium hydroxide (NaOH) is mixed with silver nitrate (AgNO3), a precipitate forms. Which compound is responsible for the precipitate observed in the reaction?

Accepted Answer

AgOH

Question 2

Write the net ionic equation for the reaction between sodium hydroxide and silver nitrate that produces a precipitate.

Accepted Answer

$$\mathrm{Ag^+ (aq) + OH^- (aq) \rightarrow AgOH (s)}$$

Question 3

Based on solubility rules, which of the following statements is correct regarding the products of the reaction between sodium hydroxide and silver nitrate?

Accepted Answer

Silver hydroxide is insoluble and forms a precipitate.

Question 4

If you add excess sodium hydroxide to the mixture, what will happen to the solubility of AgOH?

Accepted Answer

The solubility of AgOH will decrease due to the common ion effect.

Question 5

Which of the following best describes the type of reaction occurring when sodium hydroxide is mixed with silver nitrate?

Accepted Answer

Precipitation reaction

Question 6

Given the reaction: $$\mathrm{$$AgNO_3$$ (aq) + NaOH (aq) \rightarrow $$NaNO_3$$ (aq) + AgOH (s)}$$, which ion is a spectator ion?

Accepted Answer

Na$$^+$$

Question 7

If the $$K_{sp}$$ for AgOH is $$1.5 	imes 10$$^{-8}$$, what is the molar solubility (S$) of AgOH in pure water?

Accepted Answer

$$S = \sqrt{K_{sp}} = 3.9 	imes 10$$^{-5}$$ M

Question 8

If you mix equal volumes of 0.10 M AgNO3 and 0.10 M NaOH, what is the initial concentration of Ag$$^+$$ and OH$$^-$$ ions before any precipitation occurs?

Accepted Answer

0.05 M Ag$$^+$$ and 0.05 M OH$$^-$$

Question 9

Which of the following would increase the solubility of AgOH in water?

Accepted Answer

Decreasing the pH by adding acid

Question 10

If the reaction between sodium hydroxide and silver nitrate is carried out in the presence of ammonia (NH3), what effect does ammonia have on the solubility of AgOH?

Accepted Answer

Ammonia increases the solubility of AgOH by forming a complex ion.

Question 11

Which of the following best explains why AgOH forms a precipitate when sodium hydroxide is added to silver nitrate?

Accepted Answer

AgOH is insoluble in water due to its low $$K_{sp}$$ value.

Question 12

If the $$K_{sp}$$ for AgOH is $$1.5 	imes 10$$^{-8}$$, what is the maximum concentration of OH$$^-$$ that can exist in a solution before AgOH begins to precipitate, assuming [Ag$$^+$$] = 0.01 M?

Accepted Answer

$$1.5 	imes 10$$^{-6}$$ M

Question 13

Which of the following statements is true regarding the conductivity of the solution after the formation of AgOH precipitate?

Accepted Answer

The conductivity decreases because AgOH removes ions from solution.

Question 14

If you filter the mixture after the reaction, which ions will remain in the filtrate?

Accepted Answer

Na$$^+$$ and NO$$_3^-$$

Question 15

Which of the following is a correct solubility product expression for AgOH?

Accepted Answer

$$K_{sp} = [Ag^+][OH^-]$$

Solubility Equilibria and Precipitation Reactions

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