To determine the amount of water crystallisation in washing soda

Draw a diagram of this experiment

Step 1

Weigh sodium carbonate and dissolve it in a beaker of water.

Step 2

Pour it into a volumetric flask using a funnel

Step 3

Add water until it reaches the graduation mark and invert it

Step 4

Pipette sodium carbonate solution into a conical flask.and add methyl orange

Step 5

Pour HCl into a burette with a funnel and drip it into the conical flask until it turns pink

Step 6

Repeat it 2 more times

Why is the volumetric flask inverted?

Ensures solution is homogenous

Colour change of this experiment

Orange to pink

Why is deionised water used instead?

Tap water may have dissolved ions that may affect pH of the solutions