KOH + SO 3 =
NaOH + Fe 2 (SO 4 ) 3 =
Ca(OH) 2 +HNO 3 =

Fe(OH)3 →

.

Объяснение:

KOH + SO3 = KHSO4 ( недостаток KOH)

2KOH + SO3 = K2SO4 + H2O ( избыток KOH)

6NaOH + Fe2(SO4)3 = 2Fe(OH)3 + 3Na2SO4

Ca(OH)2 + 2HNO3 = Ca(NO3)2 + 2H2O

2Fe(OH)3 - Fe2O3 + 3H2O