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  • If <img alt="\mathrm{pK_a=-\log\; K_a=4 \text{ and } K_a=C x^2}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm%7BpK_a%3D-%5Clog%5C%3B%20K_a%3D4%20%5Ctext%7B%20and%20%7D%20K_a%3DC%2

If \mathrm{pK_a=-\log\; K_a=4 \text{ and } K_a=C x^2} then Van't Hoff factor for weak monobasic acid when C = 0.02 M is

Option: 1

i = 3.06
 


Option: 2

i = 1.01


Option: 3

i = 2.07


Option: 4

i = 1.07


Answers (1)

best_answer

\begin{aligned} & \mathrm{ H A \rightleftharpoons H^{+}+A^{-}} \\ \\& \mathrm{i=[1+(y-1) x]=1+x} \\ \\& \mathrm{pK_a=4=-\log K_a} \\ \\& \mathrm{K_a=10^{-4}=C x^2} \end{aligned}

\begin{aligned} & \mathrm{1 \times 10^{-4}=0.02 \times x^2} \\ \\& \mathrm{\frac{1 \times 10^{-4}}{0.02}=x^2} \\ \\& \text{x}=0.07 \\ \\& \text{i}=1+\text{x} \\ \\& \text{i}=1+0.07 \\ \\& \text{i}=1.07 \end{aligned}

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Sanket Gandhi

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