Strong and Weak Acids

Aqueous solutions of a weak acid and a strong acid of equal concentration are compared. Which statements are correct?

I. The weak acid is less dissociated than the strong acid.

II. The strong acid reacts with a metal oxide but the weak acid does not.

III. The strong acid has greater conductivity than the weak acid.

• I and II only

• I and III only

• II and III only

• I, II and III

Which compound is a strong acid?

• NH₃

• HNO₃

• H₂CO₃

• CH₃COOH

Which of the following is the correct definition for a strong acid?

• Partially dissociates into ions when dissolved in water and the change is not reversible

• Fully dissociates into ions when dissolved in water and the change is not reversible

• Fully dissociates into ions when dissolved in water and the change is reversible

• Partially dissociates into ions when dissolved in water and the change is reversible

A student researched some of the properties of H₂CO₃. Based on the properties described, what type of chemical is H₂CO₃?

• Acid

• Base

• Salt

• Polyatomic ion

Tags

FL.SC.8.P.8.8

What kind of compound produces a hydrogen ion when dissolved in water?

• ionic compound

• covalent compound

• acid

• base

Tags

NGSS.HS-PS1-5

Which of the following acids will conduct electricity the best?

• Ethanoic acid

• Nitric acid

• Carbonic acid

• Citric acid

Tags

NGSS.HS-PS3-5

What are the weak acids and bases?

• all acids and bases are weak

• if not classified as strong, the acid/base is considered weak

• all acids and bases are strong

• there are more strong acids and bases than there are weak acids/bases

Consider the general equation for an acid in water:
HA(aq) + H₂O ↔ H₃O⁺ + A^-
If there is a lot of product, what does that tell you about the acid?

• K_a > 1  Strong acid

• K_a > 1  Weak acid

• K_a < 1  Strong acid

• K_a < 1  Weak acid

Which of the following is a strong acid?

• Ethanoic acid

• Nitric acid

• Carbonic acid

• Citric acid

Which of the following is the correct balanced equation showing the dissociation of sulfuric acid into ions?

• H₂SO₄ (aq) → H⁺ (aq) + SO₄^–(aq)

• H₂SO₄ (aq) ⇌ 2H⁺ (aq) + SO₄^2- (aq)

• HSO₄ (aq) → H⁺(aq) + SO₄^–(aq)

• H₂SO₄ (aq) → 2H⁺ (aq) + SO₄^2- (aq)

Tags

NGSS.HS-PS1-2