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(A) salt of a strong base and a weak acid undergoes anionic hydrolysis to produce a basic solution. $1$. Sodium borate $(Na_2B_4O_7)$ is a salt of a s

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Sodium borate

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(A) salt of a strong base and a weak acid undergoes anionic hydrolysis to produce a basic solution. $1$. Sodium borate $(Na_2B_4O_7)$ is a salt of a strong base $(NaOH)$ and a weak acid $(H_3BO_3)$,so its aqueous solution is basic. $2$. Ammonium chloride $(NH_4Cl)$ is a salt of a weak base $(NH_4OH)$ and a strong acid $(HCl)$,so its aqueous solution is acidic. $3$. Calcium nitrate $(Ca(NO_3)_2)$ is a salt of a strong base $(Ca(OH)_2)$ and a strong acid $(HNO_3)$,so its aqueous solution is neutral. $4$. Sodium sulfate $(Na_2SO_4)$ is a salt of a strong base $(NaOH)$ and a strong acid $(H_2SO_4)$,so its aqueous solution is neutral. Therefore,the correct option is $A$.

Which of the following $0.1 \ M$ aqueous solutions will be basic?

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