Ks expressions and dissolution eqs

What is a dissolution equation?

• Ions coming together to form a solid

• Solid dissolving to form ions

• An equation with no answers

• Ions coming together to form a liquid

How do the following two elements bond together?
Al³⁺  O^2-         

• AlO
• Al₂O₃
• Al₃O₆
• Al₃O₂

Tags

NGSS.HS-PS1-2

Which of the following will form an ion with a 2- charge?

• Ca
• Se
• Ge
• N

Write the correct formula for an ionic compound formed from S^2- and Rb⁺.

• SRb₂

• SRb

• Rb₂S

• RbS₂

What is the correct dissolution equation for barium sulfate BaSO₄

• BaSO_{4 (s)} ↔ Ba²⁺ (aq) + SO₄^2- (aq)

• BaSO_{4 (s)} ↔ Ba⁺ (aq) + SO₄^- (aq)

• Ba²⁺ (aq) + SO₄^2- (aq) ↔ BaSO_{4 (s)}

• BaSO_{4 (s)} ↔ Ba⁺ (aq) + SO₄^2- (aq)

Identify the incorrect statement about achieving equilibrium.

• achieved when product and reactant concentrations are equal

• achieved when forward and reverse reaction rates are same

• achieved when concentration of reactants is stable/constant

• achieved when concentration ratio of reactants to products becomes stable, thus fixing the equilibrium constant (equilibrium position)

What is the equilibrium expression for the solubility product (K_s) of the following salt :

Mg(OH)₂

• K_s = [Mg²⁺] [OH^-]²

• K_s = [Mg²⁺]² [OH^-]

• K_s = [Mg⁺] [OH^-]

• K_s = [Mg⁺] [OH^-]²

Which of the following equation represents the dissolution equation of PbCl₂ in water ?

• PbCl₂ (s) ↔ 2Pb⁺(aq) + Cl^2-(aq)

• PbCl₂ (s) ↔ Pb²⁺(aq) + 2Cl^-(aq)

• PbCl₂ (s) + H₂O (l) ↔ Pb²⁺(aq) + 2Cl^-(aq)

• PbCl₂ (s) ↔ Pb⁺(aq) + Cl^-(aq)

Which of the following equation represents the dissolution equation of Ca₃(PO₄)₂ in water ?

• Ca₃(PO₄)₂(s) ↔ 2Ca³⁺(aq) + 3PO₄^2-(aq)

• Ca₃(PO₄)₂(s) ↔ 3Ca²⁺(aq) + 2PO₄^3-(aq)

• Ca₃(PO₄)₂(s) ↔ 3Ca⁺(aq) + 2PO₄^-(aq)

• Ca₃(PO₄)₂(s) ↔ 2Ca²⁺(aq) + 3PO₄^3-(aq)

What is the equilibrium expression for the solubility product (K_s) of the following salt :

Al(OH)₃

• K_s = [Al⁺] [OH^-]³

• K_s = [Al²⁺] [OH^-]³

• K_s = [Al⁺]³ [OH^3-]

• K_s = [Al³⁺] [OH^-]³