1.42. Viết phương trình dạng phân tử ứng với phương trình ion rút gọn sau :
1. Ba2+ + C\({O_3}^{2 - }\) \( \to \) BaC03\( \downarrow \)
2. Fe3+ + 3O\({H^ - }\) \( \to \) Fe(OH)3\( \downarrow \)
3. N\({H^{4 + }}\) + O\({H^ - }\) \( \to \) NH3\( \uparrow \) +H20
4. \({S^{2 - }}\) + 2H+ \( \to \) H2S\( \uparrow \)
5. HClO + O\({H^ - }\) \( \to \) Cl\({O^ - }\) + H20
6. C02 + 2O\({H^ - }\) \( \to \) C\({O_3}^{2 - }\) + H20
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1. \(BaS{O_4} + N{a_2}C{O_3} \to \)\(BaC{O_3} + N{a_2}S{O_4}\)
2. \(2FeC{l_3} + 3Ba{\left( {OH} \right)_2} \to \)\(2Fe{\left( {OH} \right)_3} + 3BaC{l_2}\)
3. \({(N{H_4})_2}S{O_4} + 2KOH \to \)\(2N{H_3} + 2{H_2}O + {K_2}S{O_4}\)
4. \(FeS + 2HCl \to \)\({H_2}S + FeC{l_2}\)
5. \(NaOH + HClO \to NaClO + {H_2}O\)
6. \(C{O_2} + 2NaOH \to N{a_2}C{O_3} + {H_2}O\)