Write the reaction equations that can be used to obtain copper (II) hydroxychloride, potassium hydrosulfide, calcium bicarbonate.

Obtaining copper (II) hydrochloride: Сu (ОН) 2 * НС1 = CuOHCl + Н2O
Obtaining potassium hydrosulfide: KOH + H2S = KHS + H2O
Obtaining calcium bicarbonate: Ca (OH) 2 + CO2 = Ca (HCO3) 2

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