pH Calculations

The pH of a buffer solution changes when it is diluted.

• True

• False

0.0140 mols of NaOH and 1.00 mols of H₂SO₄ were added to a flask, and filled it to the 900 mL mark with distilled water. What is the pH of the solution?

• 0.26

• 1.18

• 0.3

• 0.67

• 1.32

1.00 x 10^-9 g of Al(OH)₃ was added to a beaker which was filled to the 1.00 L mark with water. What is the pH of the solution?

• 7.225

• 8.444

• 10.42

• 7

• 7.164

Which is the correct equation for calculating pH?

• pH = log[H⁺]

• pH = -log[H⁺]

• pH = 10^-[H+]

• pH = In[H⁺]

What is the [H⁺] in a solution with a pH of 11?

• 1 x 10^-1 M

• 1 x 10^-2 M

• 1 x 10¹¹ M

• 1 x 10^-11 M

Which equation allows the calculation of the hydrogen ion concentration if the pH of a solution is known?

• [H⁺] = 10^-log(pH)

• [H⁺] = 10^-(pH)

• [H⁺] = 10^(pH)

• [H⁺] = -log(pH)

A solution is prepared by dissolving 4.85 g of HCl into enough water to make 2.50 L of solution. Calculate the pH of the solution.

• 2.274

• 1.724

• 1.472

• 1.274

The pH of a solution is 7.880. What is the concentration of [H₂O⁺] in the solution?

• 5.86 x 10^-8 M

• 4.12 x 10^-8 M

• 1.32 x 10^-9 M

• 3.67 x 10^-8 M

• 1.32 x 10^-8 M

If the H₃O⁺ ion concentration of solution is increased ten times, its pH will:

• Increase by 10

• Decrease by 1

• Increase by 1

• Decrease by 10

The pH scale is a range from:

• 1-7
• 0-14
• 1-5
• 1-20