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Solubility Product Constant Quiz

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Questions and Answers

What is the significance of Ksp in the context of solubility?

Ksp measures the concentration of ions in a saturated solution.

Ksp represents the molar ratio of the cation and anion in a salt.

Ksp indicates the solubility product of a salt at a specific temperature. (correct)

Ksp determines the color change at the endpoint of a titration.

Which salt precipitates first in the given sequence?

AgBr

AgSCN

AgCN

AgI (correct)

What is the purpose of using Potassium Chromate (K2CrO4) as an indicator in the titration process?

To neutralize the solution for accurate endpoint detection.

To prevent the precipitation of Ag2CrO4 at the endpoint.

To form a yellow color at the endpoint when all Cl- ions are consumed. (correct)

To react with Ag+ ions to form a red precipitate at the endpoint.

At what pH range should Mohr's method be conducted to avoid masking of the endpoint color?

<p>pH between 6.5 and 9</p> Signup and view all the answers

What happens to Ag+ ions at pH greater than 9 during precipitation titrations using Mohr's method?

<p>Ag+ ions form a brown to black precipitate.</p> Signup and view all the answers

Study Notes

Ag/Cl system: AgCl precipitates in order of decreasing Ksp values - AgI, AgBr, AgCl
Ksp values for various silver salts: AgI (8.3 × 10-17), AgBr (5.0 × 10-13), AgCN (2.2 × 10-16), AgSCN (1.82 × 10-10)
Standard Ag-Cl precipitation titration: Type: direct, Standard solution: AgNO3, pH: neutral to slightly alkaline (pH ≈ 6.5 -9)
Endpoint detection: Ag2CrO4 (brick red ppt) formation due to the reaction with AgNO3 and K2CrO4 indicator
Mohr's method: Neutral or slightly alkaline medium (pH ≈ 6.5 -9)
Precipitation of AgOH and Ag2O at pH > 9, consumption of titrant and masking of endpoint color
At pH < 6.5: chromate ion changes to acid chromate and dichromate, forming soluble salts with Ag+, preventing colored ppt formation at endpoint.

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Description

Test your knowledge of solubility product constant (Ksp) with this quiz. Understand the relationship between Ksp values and solubility, and learn about the precipitation order of different salts.