Dissociation constant for a monobasic acid is | vedclass

Name: PDF Generator App | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

$\mathrm{K}_{\mathrm{a}}=10^{-4}=\mathrm{C}_{0} \alpha^{2} \quad \% \alpha=2 \%$

$\alpha=\frac{2}{100}=0.02$

$\because C_{0}=\frac{K_{a}}{\alpha

Vedclass · Accepted Answer

$2.3$

Vedclass · Answer

$\mathrm{K}_{\mathrm{a}}=10^{-4}=\mathrm{C}_{0} \alpha^{2} \quad \% \alpha=2 \%$

$\alpha=\frac{2}{100}=0.02$

$\because C_{0}=\frac{K_{a}}{\alpha^{2}}=\frac{10^{-4}}{0.02 	imes 0.02}=\frac{1}{4}$

$\left[\mathrm{H}^{+}ight]=\mathrm{C}_{\mathrm{o}} \alpha$

$=\frac{1}{4} 	imes 0.02=0.005 \Rightarrow 5 	imes 10^{-3}$

$\mathrm{pH}=-\log \left[\mathrm{H}^{+}ight]$

$=-\log \left[5 	imes 10^{-3}ight]$

$=-[\log 5-3 \log 10]$

$=2.3$

Dissociation constant for a monobasic acid is $10^{-4}$ . What is the $pH$ of the monobasic acid ? (If $\%$ dissociation $= 2\,\%$ )

Similar Questions

The solution of $N{a_2}C{O_3}$ has $pH$

A weak base $MOH$ of $0.1\,N$ concentration shows a $pH$ value of $9$ . What is the percentage degree of ionization of the base ? .......$\%$

Discuss the factors affecting acid strength by examples.

The $pH$ of a $0.1\ M$ aqueous solution of a very weak acid $(HA)$ is $3$. What is its degree of dissociation ?......$\%$

$25$ $mL$ $0.1$ $M$ $HCl$ solution is diluted till $500$ $mL$. Calculate $pH$ of dilute solution.