KOH + HCL = KCl + H2O
n KOH = 5.6 / 56 = 0.1 моль
n KOH = n H2O ==> n H2O = 0.1 моль
m h2o = 18*0.1=1.8 г
3СН₃-СH=CH₂+2KMnO₄+4H₂O→3CH₃-CH(OH)-CH₂(OH)+2MnO₂+4KOH