# Lesson Worksheet: Calculating pH Chemistry

In this worksheet, we will practice calculating the pH of a solution and describing the ion-product constant of water.

**Q1: **

At a temperature of , the value of is .

What is the of water at this temperature? Give your answer to 1 decimal place.

What is the of water at this temperature? Give your answer to 1 decimal place.

At this temperature, is water acidic, basic, or neutral?

- ABasic
- BAcidic
- CNeutral

**Q2: **

A solution at has an of mol/L. Is the solution acidic, basic, or neutral?

- ABasic
- BAcidic
- CNeutral

**Q3: **

The pH of a solution is measured to be 4.15.
What is the concentration of hydronium ions in this solution? Give your answer to 2 decimal places and in units of mol⋅dm^{−3}.

- A mol⋅dm
^{−3} - B mol⋅dm
^{−3} - C mol⋅dm
^{−3} - D mol⋅dm
^{−3} - E mol⋅dm
^{−3}

**Q4: **

Which of the following equations can be used to calculate the pH of a solution from the concentration of hydronium ions?

- A
- B
- C
- D
- E

**Q5: **

A solution at has a hydroxide ion concentration of
mol⋅dm^{−3}. What is the pH of this solution to one decimal place?

**Q6: **

A solution at has aof M. What is the pOH of this solution to 2 decimal places?

**Q7: **

What is the concentration of ions in a solution at with a pH of 12.45? Give your answer to 2 decimal places.

- A mol⋅dm
^{−3} - B mol⋅dm
^{−3} - C mol⋅dm
^{−3} - D mol⋅dm
^{−3} - E mol⋅dm
^{−3}

**Q8: **

What is the pH of a solution with a of mol⋅dm^{−3}? Give your answer to 1 decimal place.

**Q9: **

An aqueous solution at has a of M. What is the value of to the nearest whole number?

- A M
- B M
- C M
- D M
- E M

**Q10: **

Two water molecules are able to react with other forms to form a hydronium ion and a hydroxide ion. This is known as the self-ionization of water. Using the concentrations of ions produced, it is possible to determine the equilibrium constant for the ionization of water, also known as the ion product constant of water.

Which of the following equations shows the ion product constant of water?

- A
- B
- C
- D
- E

If the value of is , what is the value of to 3 decimal places?

- A mol⋅dm
^{−3} - B mol⋅dm
^{−3} - C mol⋅dm
^{−3} - D mol⋅dm
^{−3} - E mol⋅dm
^{−3}