Question

Complete and balance the following chemical equations:
(a) $\mathrm{Zn}\left(\mathrm{s}\right)+\mathrm{HCl}\left(\mathrm{aq}\right)\underset{}{\to }$
(b) ${\mathrm{Na}}_2{\mathrm{CO}}_3\left(\mathrm{s}\right)+\mathrm{HCl}\left(\mathrm{aq}\right)\underset{}{\to }$
(c) ${\mathrm{NaHCO}}_3\left(\mathrm{s}\right)+\mathrm{HCl}\left(\mathrm{aq}\right)\underset{}{\to }$
(d) $\mathrm{NaOH}\left(\mathrm{aq}\right)+\mathrm{HCl}\left(\mathrm{aq}\right)\underset{}{\to }$
(e) $\mathrm{CuO}\left(\mathrm{s}\right)+\mathrm{HCl}\left(\mathrm{aq}\right)\underset{}{\to }$

Answer 1

(a) Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)

(b) Na₂CO₃(s) + 2HCl(aq) → 2NaCl(aq) + CO₂(g) + H₂O(l)

(c) NaHCO₃(s) + HCl(aq) → NaCl(aq) + H₂O(l) + CO₂(g)

(d) NaOH(aq) + HCl(aq)→ NaCl(aq) + H₂O(l)

(e) CuO(s) + 2HCl(aq) → CuCl₂(aq) + H₂O(l)