Write down the reaction equation: Br2- HBr- ZnBr2 – Zn (NO3) 2- Zn (OH) 2- Na2 [Zn (OH) 4]

1. Interaction with hydrogen:

Br2 + H2 = 2HBr;

2.Zinc displaces hydrogen from hydrogen bromide:

2HBr + Zn = ZnBr2 + H2 ↑;

3.the reaction of ion exchange with the formation of insoluble silver bromide makes it possible to obtain zinc nitrate:

ZnBr2 + 2AgNO3 = Zn (NO3) 2 + 2AgBr ↓;

4.Interaction with alkalis, we obtain insoluble zinc hydroxide:

Zn (NO3) 2 + 2KOH = Zn (OH) 2 ↓ + 2KNO3;

5.Adding an excess of alkali, we obtain a soluble complex salt – sodium tetrahydroxozincate:

2NaOH + Zn (OH) 2 = Na2 [Zn (OH) 4].