AP Chem, Acids and Bases

What is the conjugate base of HClO₄?

• H⁺

• Cl^-

• ClO₃^-

• ClO₄^-

Which is a strong acid?

• 12.0M HNO₂

• 10.0M H₂SO₃

• 5.0M HI

• 5.0M HF

What color is BTB in an acid?

• yellow

• blue

• pink

• clear

What is the closest pH to a solution with a [H⁺] = 2.5 x 10^-10?

• 2.5

• 3.0

• 4

• 9

The [OH^-] = 4.0 x 10^-9, what is the pH of the solution?

• 9.0

• 5.7

• 8.3

• 4.3

Which acid produces the strongest conjugate base?

• HClO₄ (Ka= 1.0 x 10⁷)

• HCN (Ka= 4.0 x 10^-10)

• H₃PO₄ (Ka= 7.5 x 10^-3)

• H₂CO₃ (Ka = 4.2 x 10^-7)

Tags

NGSS.HS-PS1-1

Which salt will form an acidic solution?

• NH₄Cl

• NaCl

• NaHCO₃

• BaCl₂

Which represents an acid with the smallest Ka value?

• HX

• HY

• HZ

Which acid would have the smallest pH value?

• HX

• HY

• HZ

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which relationship relates Ka, Kb and Kw?

• Kw = Ka + Kb

• Kw = Kb/Ka

• Ka = Kw + Kb

• Kb = Kw/Ka