Honors Weak A & B, Ka, Hydrolysis, Naming Acids Review

What might happen if you mixed a strong acid with an equally strong base?

• You would see an explosive chemical reaction.
• The acid would destroy the base.
• The base would destroy the acid.
• You'd wind up with a pH-neutral substance.

Tags

NGSS.MS-PS1-2

Which of the following would be a weak base?

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Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-3

Which of the following is a strong acid?

• HCl

• HC₂H₃O₂

• HCN

• HF

Select the strong acids.

• HF

• HCl

• HBr

• HI

Select the weak acid.

• HNO₃

• HNO₂

• HCl

• HI

A weak acid always has a K_a value.

• True

• False

HA, a weak acid, is partially dissociated in water into hydrogen ions and A^- . Which of the following equation represents dissociation of HA, a weak acid, in water?

• HA(aq) ⇌ H^- (aq) + A⁺ (aq)

• H^- (aq) + A⁺ (aq) ⇌ HA(aq)

• HA(aq) ⇌ H⁺ (aq) + A^- (aq)

• H⁺ (aq) + A^- (aq) ⇌ HA(aq)

dissociation of weak acid, HA, is represented by following equation :

HA(aq) + H₂O(l) ⇌ H₃O⁺(aq) + A^-(aq)

The equilibrium constant for this reaction is represented by K_a . Which of the following equation represents expression of equilibrium constant, K_a?

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Acetic Acid (HC₂H₃O₂) is a weak monoprotic acid. It's concentration is 0.20M and it's Ka value is 1.8x10 -5. Calculate it's pH value.

• .698

• 2.72

• 11.28

• None of the answers are correct

Solutions of carbolic acid, commonly known as phenol (HC₆H₅O(aq)), are widely used as disinfectants. Carbolic acid ionizes in water according to the equation

HC₆H₅O(aq) + H₂O(l) ⇌ C₆H₅O^-(aq) + H₃O⁺(aq)

What is the correct Ka expression for this?

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