Chemical And Ionic Equilibrium Result Question 35

35. The $\mathrm{pH}$ of $10^{-8} $ $\mathrm{M}$ solution of $\mathrm{HCl}$ in water is

$(1981,1 \mathrm{M})$

(a) $8$

(b) $-8$

(c) between $7$ and $8$

(d) between $6$ and $7$

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Answer:

Correct Answer: 35. ( d )

Solution:

  1. No matter, what is the concentration of $\mathrm{HCl}$, its $\mathrm{pH}$ will always be less than $7$ at $25^{\circ} \mathrm{C}$. In the present case, the solution is very dilute, $\mathrm{pH}$ will be between $6$ and $7$.