# Question #88747

Apr 7, 2017

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

#### Explanation:

What you will see is bubbles of carbondioxide escaping:

$N {a}_{2} C {O}_{3} + 2 H C l \to 2 N a C l + C {O}_{2} + {H}_{2} O$

Or, in ion form:

$C {O}_{3}^{2 -} \left(a q\right) + 2 {H}^{+} \left(a q\right) \to C {O}_{2} \left(g\right) + {H}_{2} O \left(l\right)$

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.