NaCl + H2O is neutral
Li2ClO3 + 2H2O = 2LiOH + H2ClO3 (Strong base + strong acid = neutral solution or basic because of the stochio number???)
CH3COONa + H2O = CH2COOH + NaOH (Weak acid + Strong base = basic solution)
K2CO3 + H2O = 2KOH + H2CO3 (Strong base + weak acid = basic solution)
NH4ClO3 is made of a weak acid + weak base, we don"t have the ka to find the exact ph, but by elimination it’s the only option that fits
clo3 is from a strong acid not weak.
HClO3 + NH3•H2O → NH4ClO3 + H2O
Thank you for spotting my mistake! i’ll try to edit my answer