Conjugate Acids and Bases and pH

What is the conjugate base in the following reaction?

• HCO₃^- 
• HCl
•  H₂CO₃ 
• ^Cl-

What is the conjugate acid in the following equation?

• PO₄^3- 
• HNO₃ 
• NO₃^- 
• HPO₄^2-
  

What is the conjugate base of HCO₃^-?

• HCO₃^-
• H₂CO₃^-
• H₂CO₃
• CO₃^2-

What is the pH of a solution that has an [H₃O⁺] =1x10^-4?

• 4
• -4
• 2
• 3

The pH of a solution is 2.0.  What is the [OH^-] concentration?

• 1x10^-12M
• 12 M
• 1x10^-2M
• 2 M

The pH of a 0.001 M solution of HCl is 

• 11
• 3
• -3
• -11

Which is most acidic?

• pH = 8.5
• [H₃O⁺] = 1 x  10^-13
• [H₃O⁺] = 1 x  10^-2
• pH = 3

The pH scale measures...

• ...the strength of an acid.
• ...the strength of hydrogen ions.
• ...the concentration of hydrogen ions.
• ...the concentration of an acid

Which is the stronger acid?

• pH 1
• pH 4
• pH 8
• pH 13

A solution with a pH of 7 is________

• increasing
• neutral
• decreasing
• apple juice