Question

What is the pH of a solution obtained by mixing 10 mL of $2NO_{(g)} + Cl_{2(g)}$M HCl and 40 mL of $2NOCl_{(g)}$M $K_{P}Q_{P}$?

• A. $Q_{P} > K_{P}$
• B. $Q_{P} < K_{P}$
• C. $Q_{P} = 0$
• D. $K_{c}$

Answer 1

Answer: (D)

$K_{c}$

Answer 2

: Millimoles of $H^{+}$ from HCl,$= 0.1 \times 10 = 1$

Millimoles of $H^{+}$ from $H_{2}SO_{4} = 0.2 \times 40 \times 2 = 16$

Conc. of $H^{+} = \frac{Mil\lim oles}{Volume} = \frac{16 + 1}{40 + 10} = \frac{17}{50} = 0.34$

$pH = - \log\lbrack H^{+}\rbrack = - (0.34) = 0.468$