Question

The pH of lemon juice was
determined using a pH paper. Excess
of NaOH solution is then added to
the lemon juice and the pH of the
resulting solution is again
determined by using pH paper. The
colour of pH paper will change from:​

Answer 1

Answer:

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Explanation:

When pH of lemon juice acidic in nature was determined using pH paper.

color change:- Blue to vivid red

When excess NaOH added to lemon juice pH changed; acidity decreased⟶NaOH in excess, ∴ becomes basic.

Pink⟶Blue

Answer 2

Answer:

In the lemon juice experiment, the pH paper turns from blue to vivid red, indicating the presence of H3O+ ions: lemon juice is acidic.

Explanation: