The scheme of transformations is given: ZnO → X1 → Zn (OH) 2 → X2 Write down the molecular equations of reactions

| November 20, 2020 | education

The scheme of transformations is given: ZnO → X1 → Zn (OH) 2 → X2 Write down the molecular equations of reactions, which can be used to carry out the indicated transformations. For the second transformation, write an abbreviated ionic equation.

The chain of transformations shows the genetic relationship between substances of different classes. In it, you can choose the reaction equations if the substance can be obtained in several ways. There are three reaction equations in this chain:
1) ZnO +2 HCl = ZnCl2 + H2O (zinc chloride and water; exchange)
2) ZnCl2 + 2 NaOH = Zn (OH) 2 + 2 NaCl (zinc hydroxide and sodium chloride; exchange);
Zn (2+) + 2Cl (-) + 2 Na (+) + 2 OH (-) = Zn (OH) 2 + 2Cl (-) + 2 Na (+);
Zn (2+) + 2 OH (-) = Zn (OH) 2.
3) Zn (OH) 2 = ZnO + H2O (zinc oxide and water; decomposition)



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