03. Degree of Dissociation
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Chemical Equilibrium

229093 The $K_{\mathrm{sp}}$ for the following dissociation is $1.6 \times 10^{-5}$
$\mathrm{PbCl}_{2}(\mathrm{~s}) \rightleftharpoons \quad \mathrm{Pb}^{2+}(\mathrm{aq})+2 \mathrm{Cl}^{-}(\mathrm{aq})$
Which of the following choices is correct for a mixture of $300 \mathrm{~mL} 0.134 \mathrm{M} \mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}$ and 100 mL 0.4 M NaCl?

1 $\mathrm{Q}<\mathrm{K}_{\mathrm{sp}}$
2 $Q>K_{s p}$
3 $\mathrm{Q}=\mathrm{K}_{\mathrm{sp}}$
4 Not enough data provided
Chemical Equilibrium

229094 When $0.05 \mathrm{M}$ dimethyl amine is dissolve in 0.1 $\mathrm{M} \mathrm{NaOH}$ solution then the percentage dissociation of dimethyl amine is: $\left(\mathrm{K}_{\mathrm{b}}\right)_{\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}}=5 \times 10^{-4}$

1 $5 \times 10^{-5}$
2 $5 \times 10^{-3}$
3 $5 \times 10^{-1}$
4 $5 \times 10^{-2}$
Chemical Equilibrium

229096 Calculate Van't Hoff factor (i) for an aqueous solution of $\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$ having a degree of dissociation $(\alpha)$ equal to 0.778 .

1 4.334
2 3.334
3 0.222
4 2.334
Chemical Equilibrium

229097 Relationship between Van't Hoff's factor $(i)$ and degree of dissociation $(\alpha)$ is

1 $\mathrm{i}=\frac{\alpha-1}{\mathrm{n}^{\prime}-1}$
2 $i=\frac{\alpha-1}{1-n^{\prime}}$
3 $\alpha=\frac{1-\mathrm{i}}{\mathrm{n}^{\prime}-1}$
4 $\alpha=\frac{i-1}{n^{\prime}-1}$
Chemical Equilibrium

229093 The $K_{\mathrm{sp}}$ for the following dissociation is $1.6 \times 10^{-5}$
$\mathrm{PbCl}_{2}(\mathrm{~s}) \rightleftharpoons \quad \mathrm{Pb}^{2+}(\mathrm{aq})+2 \mathrm{Cl}^{-}(\mathrm{aq})$
Which of the following choices is correct for a mixture of $300 \mathrm{~mL} 0.134 \mathrm{M} \mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}$ and 100 mL 0.4 M NaCl?

1 $\mathrm{Q}<\mathrm{K}_{\mathrm{sp}}$
2 $Q>K_{s p}$
3 $\mathrm{Q}=\mathrm{K}_{\mathrm{sp}}$
4 Not enough data provided
Chemical Equilibrium

229094 When $0.05 \mathrm{M}$ dimethyl amine is dissolve in 0.1 $\mathrm{M} \mathrm{NaOH}$ solution then the percentage dissociation of dimethyl amine is: $\left(\mathrm{K}_{\mathrm{b}}\right)_{\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}}=5 \times 10^{-4}$

1 $5 \times 10^{-5}$
2 $5 \times 10^{-3}$
3 $5 \times 10^{-1}$
4 $5 \times 10^{-2}$
Chemical Equilibrium

229096 Calculate Van't Hoff factor (i) for an aqueous solution of $\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$ having a degree of dissociation $(\alpha)$ equal to 0.778 .

1 4.334
2 3.334
3 0.222
4 2.334
Chemical Equilibrium

229097 Relationship between Van't Hoff's factor $(i)$ and degree of dissociation $(\alpha)$ is

1 $\mathrm{i}=\frac{\alpha-1}{\mathrm{n}^{\prime}-1}$
2 $i=\frac{\alpha-1}{1-n^{\prime}}$
3 $\alpha=\frac{1-\mathrm{i}}{\mathrm{n}^{\prime}-1}$
4 $\alpha=\frac{i-1}{n^{\prime}-1}$
Chemical Equilibrium

229093 The $K_{\mathrm{sp}}$ for the following dissociation is $1.6 \times 10^{-5}$
$\mathrm{PbCl}_{2}(\mathrm{~s}) \rightleftharpoons \quad \mathrm{Pb}^{2+}(\mathrm{aq})+2 \mathrm{Cl}^{-}(\mathrm{aq})$
Which of the following choices is correct for a mixture of $300 \mathrm{~mL} 0.134 \mathrm{M} \mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}$ and 100 mL 0.4 M NaCl?

1 $\mathrm{Q}<\mathrm{K}_{\mathrm{sp}}$
2 $Q>K_{s p}$
3 $\mathrm{Q}=\mathrm{K}_{\mathrm{sp}}$
4 Not enough data provided
Chemical Equilibrium

229094 When $0.05 \mathrm{M}$ dimethyl amine is dissolve in 0.1 $\mathrm{M} \mathrm{NaOH}$ solution then the percentage dissociation of dimethyl amine is: $\left(\mathrm{K}_{\mathrm{b}}\right)_{\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}}=5 \times 10^{-4}$

1 $5 \times 10^{-5}$
2 $5 \times 10^{-3}$
3 $5 \times 10^{-1}$
4 $5 \times 10^{-2}$
Chemical Equilibrium

229096 Calculate Van't Hoff factor (i) for an aqueous solution of $\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$ having a degree of dissociation $(\alpha)$ equal to 0.778 .

1 4.334
2 3.334
3 0.222
4 2.334
Chemical Equilibrium

229097 Relationship between Van't Hoff's factor $(i)$ and degree of dissociation $(\alpha)$ is

1 $\mathrm{i}=\frac{\alpha-1}{\mathrm{n}^{\prime}-1}$
2 $i=\frac{\alpha-1}{1-n^{\prime}}$
3 $\alpha=\frac{1-\mathrm{i}}{\mathrm{n}^{\prime}-1}$
4 $\alpha=\frac{i-1}{n^{\prime}-1}$
Chemical Equilibrium

229093 The $K_{\mathrm{sp}}$ for the following dissociation is $1.6 \times 10^{-5}$
$\mathrm{PbCl}_{2}(\mathrm{~s}) \rightleftharpoons \quad \mathrm{Pb}^{2+}(\mathrm{aq})+2 \mathrm{Cl}^{-}(\mathrm{aq})$
Which of the following choices is correct for a mixture of $300 \mathrm{~mL} 0.134 \mathrm{M} \mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}$ and 100 mL 0.4 M NaCl?

1 $\mathrm{Q}<\mathrm{K}_{\mathrm{sp}}$
2 $Q>K_{s p}$
3 $\mathrm{Q}=\mathrm{K}_{\mathrm{sp}}$
4 Not enough data provided
Chemical Equilibrium

229094 When $0.05 \mathrm{M}$ dimethyl amine is dissolve in 0.1 $\mathrm{M} \mathrm{NaOH}$ solution then the percentage dissociation of dimethyl amine is: $\left(\mathrm{K}_{\mathrm{b}}\right)_{\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}}=5 \times 10^{-4}$

1 $5 \times 10^{-5}$
2 $5 \times 10^{-3}$
3 $5 \times 10^{-1}$
4 $5 \times 10^{-2}$
Chemical Equilibrium

229096 Calculate Van't Hoff factor (i) for an aqueous solution of $\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$ having a degree of dissociation $(\alpha)$ equal to 0.778 .

1 4.334
2 3.334
3 0.222
4 2.334
Chemical Equilibrium

229097 Relationship between Van't Hoff's factor $(i)$ and degree of dissociation $(\alpha)$ is

1 $\mathrm{i}=\frac{\alpha-1}{\mathrm{n}^{\prime}-1}$
2 $i=\frac{\alpha-1}{1-n^{\prime}}$
3 $\alpha=\frac{1-\mathrm{i}}{\mathrm{n}^{\prime}-1}$
4 $\alpha=\frac{i-1}{n^{\prime}-1}$