Titration

Titration step 1

Measure 25cm cubed of sodium hydroxide solution in conical flask using a pipette

Titration step 2

Add universal indicator which will turn purple

Titration step 3

Fill Burnett with hydrochloric acid until it hits zero

Titration step 4

Drop hydrochloric acid into sodium hydroxide until the indicator turns green and note the volume of acid used

Titration step 5

Repeat this twice and take average of results - this volume will exactly neutralise 25 cm cubed of sodium hydroxide solution

Titration step 6

Put 25cm cubed of sodium hydroxide in flask and run it to correct volume of hydrochloric acid needed - no indicator required

Titration step 7

Sodium chloride solution produced - this is then evaporated and crystallised