Investigating Neutralisation Flashcards
What is hypothesis for experiment 1?
To investigate the changes in pH when 50cm3 of dilute hydrochloride acid is neutralised by adding solid calcium hydroxide.
What’s step 1 for 1st experiment?
Measure the initial pH of the acid by using a glass rod to place a drop of the solution on a piece of universal indicator paper. Use a colour chart to match the colour of the indicator paper to the pH level.
What’s step 2 for 1st experiment?
Add calcium hydroxide to the beaker of acid.
What’s step 3 for 1st experiment?
When the solid has dissolved, measure the pH of the solution. Repeat this until all the calcium hydroxide has been added.
What’s used in experiment 2 instead to measure pH?
pH meter
What’s step 1 of 2nd experiment?
Measure initial pH of the acid by placing the sensor in the solution and measuring the value on the pH meter.
What’s step 2 of 2nd experiment?
Add calcium hydroxide to the acid.
What’s step 3 of 2nd experiment?
When the solid has dissolved, measure pH of the solution. Repeat this until all the calcium hydroxide has been added.
