9. Exercises IX

 

We will drop each hydrochloric acid, sodium hydroxide, and sugar solution on the turmeric indicator. The liquid which changes the colour of the turmeric indicator to blueyellowred is basic, that is, sodium hydroxide.

 

Now, we will place a drop of sodium hydroxide on a drop of each of the other two liquids separately. After that, we will put the drops of these mixtures on the turmericphenolphthaleinlitmus indicator. The drop, which will change the colour of the turmeric indicator to blueredyellow, has a sugar solution. This is due to the mixture of basic and neutral solutions, which is basicacidicneutral.

 

On the other hand, the drop, which will not change the colour of the turmeric indicator, contains hydrochloric acid. This is due to the hydrochloric acid reacting with sodium hydroxide to form a basicneutralacidic solution.