The plot of pH-metric titration of weak base | vedclass

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Question

(A) The titration of a weak base $(NH_4OH)$ with a strong acid $(HCl)$ involves the addition of acid to the base. Initially,the $pH$ is high (basic).

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(A) The titration of a weak base $(NH_4OH)$ with a strong acid $(HCl)$ involves the addition of acid to the base. Initially,the $pH$ is high (basic). As the strong acid is added,the $pH$ decreases gradually. Near the equivalence point,there is a sharp drop in $pH$. Since the resulting salt $(NH_4Cl)$ is acidic due to the hydrolysis of the $NH_4^+$ ion,the equivalence point $pH$ is less than $7$. Therefore,the correct plot shows a downward curve starting from a high $pH$ value.

The plot of $pH$-metric titration of weak base $NH_4OH$ vs strong acid $HCl$ looks like:

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