Составьте уравнения реакций, схемы которых:
1) $Ca(OH)_{2}$ + _ HBr → $CaBr_{2}$ + _ $H_{2}O$
2) $H_{3}PO_{4}$ + _ NaOH → $Na_{3}PO_{4}$ + _ $H_{2}O$
3) $Na_{2}CO_{3}$ + _ HCl → _ NaCl + $CO_{2} + H_{2}O$
4) $Fe_{2}(SO_{4})_ {3}$ + _ $BaCl_{2}$ → _ $BaSO_{4}$ + _ $FeCl_{3}$
1) $Ca(OH)_{2} + 2HBr → CaBr_{2} + 2H_{2}O$
2) $H_{3}PO_{4} + 3NaOH → Na_{3}PO_{4} + 3H_{2}O$
3) $Na_{2}CO_{3} + 2HCl → 2NaCl + CO_{2} + H_{2}O$
4) $Fe_{2}(SO_{4})_{3} + 3BaCl_{2} → 3BaSO_{4} + 2FeCl_{3}$