a) Mg → MgSO4 → Mg(NO3)₂ → MgCO3;
б) Ca → Ca(OH)₂ → CaCO3 → CaO → CaCl₂ → CaCO3
в) Al → Al₂O3 → AICI3 → Al(OH)3 → Na₂AIO3.

дам балли. Тільки поясніть як що і навіщо робили.
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