Ionization of weak acid and base

Higher the value of pKa

• stronger will be the base

• weaker will be base

• weaker will be acid

• stronger will be acid

Higher the value of Ka

• Stronger will be acid

• weaker will be acid

• Stronger will be base

• weaker will be base

Which of the following is strongest acid

• CH₄

• NH₃

• H₂O

• HF

Write an expression for Ka for ionization of HCN in aqueous solution. Give equation also

What happens to the acidity of a solution as the pH decreases?

• Varies randomly

• Remains the same

• Decreases

• Increases

Which of the following compounds has the highest pKa value?

• CH₃COOH

• H₂SO₄

• NH₄OH

• HCl

Which of the following statements is true regarding strong acids?

• They are weak electrolytes

• They have high pKa values

• They completely dissociate in water

• They have low Ka values