Question

Question #88747

Answer 1

If you mix just those two, the colour won't change.

Explanation:

What you will see is bubbles of carbondioxide escaping:

`Na_2CO_3 + 2HCl->2NaCl+CO_2+H_2O`

Or, in ion form:

`CO_3^(2-)(aq)+2H^+(aq) ->CO_2 (g)+H_2O(l)`

Note:
If you had added an indicator, like phenolphtalein, the colour of the solution would be pink/purple, and vanish as the acid is added.