Acid Base Math

What is the [OH-] if the pH is 4.9?

• 7.94 x 10-10 M
• 1.0 x 10-4  M
• 7.94 x 10-14 M
• 4.9 x 10-10 M

If [H₃O⁺]=1.7 x 10^-3 M, what is the pH of the solution?

• 2.13
• 1.81
• 2.77
• 2.42

If a solution has a [H⁺] of
1.2 x 10^-4M what is the [OH^-]?

• 8.3 x 10^-4M 
• 8.3 x 10^-11M 
• 1.2 x 10¹⁰M 
• 1.2 x 10^-4M 

What is the pH of a
4.3 x 10^-7 solution of H₂CO₃?

• 7
• 6.4
• 7.6
• 4.3

What is the pH of a 1 x 10^-8 solution of H₃O⁺?

• 8
• 6
• 7
• 7.5

What is the pH of a 3 x 10^-3 M solution of Al(OH)₃?

• 11.5
• 2.5
• 3
• 3.1

The [H⁺] is orange juice is
0.00020 M.  FInd the pH of orange juice.

• 1
• 3.7
• 10.3
• 13

The [OH^-] in a soft drink is
5.00 x 10^-12 M.  Find the pH.

• 0.002
• 2.7
• 11.3
• 14

What is the pH of a 0.13 M solution of H₂SO₄?

• 0.13
• 0.58
• 0.89
• 13.4

The following neutralization reaction occurs in the classroom.
HCl  +  KOH  -->  H₂O  +  KCl
If a student uses 25.0 mL of a 0.5M solution of KOH, what is the molarity of the acid if 15.0mL of acid neutralized?

• 0.8M
• 1.2M
• 12.5M