1 --- Б {BaCl2 == Ba(+2) + 2Cl(-)} ■3

2 --- В [K3PO4 == 3K(+) + PO4(-3)] ●4

3 --- Г {Fe2(SO4)3 == 2Fe(+3) + 3SO4(-2)} ■5

4 --- А [LiNO3 == Li(+) + NO3(-)] ●2