Question

17. Equal volumes of hydrochloric acid and sodium hydroxide solutions of same
concentration are mixed and the pH of the resulting solution is checked with a pH
paper. What would be the colour obtained? (You may use colour guide given in
Figure 2.2
O
5.
10
11
13
Figure 2.2
(a) Red
(b) Yellow
(c) Yellowish green
(d) Blue
​

Answer 1

Answer:

Yellowish green

Explanation:

When equal volumes of hydrochloric acid (strong acid) and sodium hydroxide (strong base) solution of same concentration are mixed, the result is salt and water. This is a neutralisation reaction. The aqueous solution of NaCl is neutral with pH 7. The colour of this solution obtained is yellowish green.