Which among the following salt solutions in w | vedclass

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(A) $CuCl_2$ is a salt of a strong acid $(HCl)$ and a weak base $(Cu(OH)_2)$,so its aqueous solution is acidic with $pH < 7$. $CH_3COONH_4$ is a salt

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$CuCl_2$

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(A) $CuCl_2$ is a salt of a strong acid $(HCl)$ and a weak base $(Cu(OH)_2)$,so its aqueous solution is acidic with $pH $CH_3COONH_4$ is a salt of a weak acid $(CH_3COOH)$ and a weak base $(NH_4OH)$,so its aqueous solution is approximately neutral with $pH \approx 7$. $Na_2CO_3$ is a salt of a weak acid $(H_2CO_3)$ and a strong base $(NaOH)$,so its aqueous solution is basic with $pH > 7$. $KNO_3$ is a salt of a strong acid $(HNO_3)$ and a strong base $(KOH)$,so its aqueous solution is neutral with $pH = 7$.

Which among the following salt solutions in water shows a $pH$ less than $7$?

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