Question
Write balanced molecular equations for the following word equations:
$(a)$ Calcium $+$ oxygen $\rightarrow$ Calcium oxide
$(b)$ Calcium $+$ water $\rightarrow$ Calcium $+$ hydrogen
$(c)$ Zinc $+$ sulphuric hydroxide $\rightarrow$ Zinc sulphate $+$ hydrogen
$(d)$ Lead sulphate acid $+$ ammonium hydroxide $\rightarrow$ Ammonium sulphate $+$ lead hydroxide
$(e)$ Copper hydroxide $+$ nitric acid $\rightarrow$ Copper nitrate $+$ water
$(f)$ Lead nitrate $+$ sodium Chloride $\rightarrow$ Sodium nitrate $+$ lead Chloride

Answer

$(a) \ce{2Ca + O_2 \rightarrow 2CaO}$ chloride
$(b) \ce{Ca +2H_2O \rightarrow Ca (OH)_2 + H_2}$
$(c) \ce{Zn + H_2 SO_4 \rightarrow ZnSO_4 + H_2}$
$(d) \ce{PbSO_4 + 2 NH_4 OH \rightarrow Pb [OH]_2 + \left[NH _4\right] 2SO_4}$
$(e) \ce{CU[OH]_2 + 2 HNO_3 \rightarrow CU \left[ NO_3\right]_2 + 2H_2O}$
$(f) \ce{Pb\left[NO_3\right]_2 + 2 NaCl \rightarrow 2NaNO_3 + PbCl_2}$

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