Neutralisation

Question 1

What is the apparatus used when investigating the change in pH when powdered calcium hydroxide is added to a fixed volume of dilute hydrochloric acid?

Answer 1

Eye protection
Beaker
Measuring cylinder
Balance
Spatula
Stirring rod
White tile
Universal indicator paper and pH colour chart
Dilute hydrochloric acid
Calcium hydroxide powder

Question 2

What is the method used when investigating the change in pH when powdered calcium hydroxide is added to a fixed volume of dilute hydrochloric acid?

Answer 2

Add some dilute hydrochloric acid to the beaker. Measure and record the pH of the contents of the beaker. Add a small mass of calcium hydroxide powder, stir, and then measure and record the pH again. Repeat until the pH no longer changes. Plot a titration curve - line graph with mass on the horizontal axis and pH on the vertical axis. Draw a smooth curve of best fit, ignoring anomalous results.