Question

WHICH OF THE FOLLOWING SOLUTIONS WILL TURN PHENOPHTHELENE PINK ? *

1 point

HCl (aq)

CARBON DIOXIDE (aq)

KOH (aq)

SULPHURIC ACID (aq)​

Answer 1

Explanation:

WHICH OF THE FOLLOWING SOLUTIONS WILL TURN PHENOPHTHELENE PINK ? 

a) HCl (aq)

b) CARBON DIOXIDE (aq)

c) KOH (aq) ✔

d) SULPHURIC ACID (aq)

Explaination :-

we know that, Phenolphthalein gives pink colour in basic solution and here KOH is basic solution.

Additional information :-

• Phenolphthalein indicator is colourless in acid solution.
• Phenolphthalein indicator gives pink colour in basic solution.
• An Indicator is a dye that changes colour when it is put into acid or a base.

Three most common indicator to test for acid and bases are :-

1. Litmus
2. Methyl orange
3. Phenolphthalein

• An acid turns blue litmus to red.
• A base turn red litmus to blue.
• Methyl orange indicator gives red colour in acid solution.
• Methyl orange indicator gives yellow colour in basic solution.