Ksp Ap Chemistry

Which of the following shows the correct dissolution reaction for BaCl₂?

• Ba ²⁺(aq) + Cl₂^-(aq) -> BaCl₂(s)
• BaCl₂(aq) -> Ba ²⁺(aq) + 2Cl^-(aq)
•  BaCl₂(s) -> Ba ²⁺(aq) + 2Cl^-(aq)
• Ba ²⁺(aq) + 2Cl^-(aq) -> BaCl₂(s)

Tags

NGSS.HS-PS1-7

If K < Q, which part of the reaction will speed up?

• forward
• reverse
• none

Tags

NGSS.HS-PS1-6

An unknown salt, M₂Z, has a K_sp of 3.3 x 10^-9. Calculate the solubility in mol/L of M₂Z.

• 2.9 x 10^-5 M
• 5.7 x 10^-5 M
• 9.4 x 10^-5 M
• 3.7 x 10^-5 M

The molar solubility of PbI₂ is 1.52 x 10^-3 M. Calculate the value of K_sp for PbI₂.

• 3.51 x 10^-9
• 1.40 x 10^-8
• 4.62 x 10^-6
• 1.52 x 10^-3

Silver chromate, Ag₂CrO₄, has a K_sp of 8.96 x 10^-12. Calculate the solubility in mol/L of silver chromate.

• 1.31 x 10^-4M
• 1.65 x 10^-4M
• 2.25 x 10^-12M
• 2.08 x 10^-4M

The correct mathematical expression for finding the molar solubility (s) of Sn(OH)₂ is:

• 2s² = Ksp
• 2s³ = Ksp
• 4s³ = Ksp
• 8s³ = Ksp

When the chemical reaction A + B ↔ C+ D is at equilibrium,

• both the forward and reverse reactions have stopped.
• the sum of the concentrations of A and B equals the sum of the concentrations of C and D.
• all four concentrations are equal.
• neither the forward nor the reverse reactions have stopped.

In which of the following systems would the number of moles of the substances present at equilibrium NOT be shifted by a change in the volume of the system at constant temperature?

• CO(g) + NO(g) ↔ CO₂(g) + ½ N₂(g)

• N₂(g) + 3 H₂(g) ↔ 2 NH₃(g)

• N₂(g) + 2 O₂(g) ↔ 2 NO₂(g)

• NO(g) + O₃(g) ↔ NO₂(g) + O₂(g)

2 SO₃ (g) ↔ 2 SO₂ (g) + O₂ (g)

After the equilibrium represented above is established, some pure O₂ (g) is injected into the reaction vessel at constant temperature. After equilibrium is reestablished, which of the following has a lower value compared to its value at the original equilibrium?

• Keq for the reaction.

• The total pressure in the reaction vessel.

• The amount of SO₃ (g) in the reaction vessel.

• The amount of SO₂ (g) in the reaction vessel.

Tags

NGSS.HS-PS1-7

At what time (in seconds) is equilibrium established?

• 0 seconds
• 1 second
• 5 seconds
• 10 seconds