Question

1. The size of the equilibrium constant does not vary with temperature. The size of the equilibrium constant does not vary with temperature.

2. What is qualitative analysis?

A) Analysis of the solubility of a compound in a solution.
B) Identification of the types of ions present in a solution.
C) Measurement of the quality of a solution using gravimetric analysis.
D) Separation of ions using fractional distillation.
E) Determination of whether a compound is expected to be soluble in a solution.

3. Insoluble bases tend to dissolve better in acidic solutions.

T or F

4. Solid silver chloride is significantly less soluble in 0.10 M AgNO₃ than in pure water.

5.

What will be the sign of the free energy change when solid sodium sulfate is added to the following system?

Ag₂SO₄(s) ⇌ SO₄²⁻ + 2 Ag⁺

A) ΔG > 0
B) ΔG < 0
C) ΔG = 0

T or F

Answer 1

1.Equilibrium constant is independent of concentrations of reacting species and is influenced by the temperature. The temperature change can change the equilibrium constant

2. Qualitative analysis is used to identify the presence of species present. Hence B is correct

3. The base consists of OH- which in turn reacts with H of acid. this reaction gives a salt which is souble in water

4. Solid silver chloride is less soluble in AgNo3 due to comon ion effect( production of Ag+)

5. since there are more moles on product than reactants,KSp is of the order of 10-5

deltaG =-RT lnKSp , since lnKSP becomes negative which makes deltaG +ve.