HC Unit 13 (Ch 17) Test

A minimum energy called the activation energy is needed for a reaction to occur.

(a)  

• True
• False

Tags

NGSS.HS-PS1-5

At equilibrium, the concentrations of all reactants and products are equal.

(a)  

• True

• False

The solubility of Fe(OH)₂ in water is 7.9 · 10^-6 mol/L at 25 °C. The value of the K_sp of Fe(OH)₂ at 25 °C is (a)  

• None of these

• cannot be determined

• will have no effect

• will cause [A] to increase
• will cause [C] to increase

• None of these

Tags

NGSS.HS-PS1-5

The ​ (a)   model explains why a reaction proceeds faster if the concentrations of the reacting molecules are increased.

• atomic

• gas law

• Lewis dot

• None of these

• collision

Tags

NGSS.HS-PS1-5

The molar solubility of PbI₂ is 1.5 · 10^-3 M. Calculate the value of K_sp for PbI₂.

(a)  

• None of these

The concentration of Ag⁺ in a saturated solution of Ag₂CrO₄ is 1.6 · 10^-4 M. What is the K_sp value for Ag₂CrO₄?

(a)  

4NH₃(g) + 5O₂(g) ⇌ 4NO(g) + 6H₂O(g)

What would happen to the system if oxygen were added?

(a)  

• More ammonia would be produced.

• The equilibrium would shift to the left.

• Nothing would happen.

• The equilibrium would shift to the right.
• The concentration of NO(g) would decrease.

Tags

NGSS.HS-PS1-5

The K_sp for ZnS(s) is 2.5 · 10⁻²² at 25 °C. The solubility of ZnS(s) in water at 25 °C is

(a)  

• None of these

Tags

NGSS.HS-PS1-7