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  • 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)

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)

(a) Red

(b) Yellow

(c) Yellowish green

(d) Blue

Answers (1)

Answer: (c)

Because the resulting solution is obtained as a result of neutralisation reaction

Strong Acid + Strong Base = Neutralisation. (Ph - 7)

HCl+NaOH\rightarrow NaCl+H_{2}O

The colour of the neutral solution (with pH = 7) obtained is yellowish green.

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