Predict if the solutions of the following salts are neutral,acidic or basic:
$NaCl$,$KBr$,$NaCN$,$NH_4NO_3$,$NaNO_2$ and $KF$

$(i)$ $NaCl$: It is a salt of a strong acid $(HCl)$ and a strong base $(NaOH)$,so it is neutral.
$(ii)$ $KBr$: It is a salt of a strong acid $(HBr)$ and a strong base $(KOH)$,so it is neutral.
$(iii)$ $NaCN$: It is a salt of a weak acid $(HCN)$ and a strong base $(NaOH)$,so it is basic.
$(iv)$ $NH_4NO_3$: It is a salt of a weak base $(NH_4OH)$ and a strong acid $(HNO_3)$,so it is acidic.
$(v)$ $NaNO_2$: It is a salt of a weak acid $(HNO_2)$ and a strong base $(NaOH)$,so it is basic.
$(vi)$ $KF$: It is a salt of a weak acid $(HF)$ and a strong base $(KOH)$,so it is basic.