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К раствору Nа2СО3 добавили следующие вещества: a) HCl; б) NaOH; в) Cu(NО3)2; г) K2S. В каких случаях гидролиз карбоната натрия усилится? Почему? Составьте ионно-молекулярные уравнения гидролиза соответствующих солей.