решите уравнения: BaCl2+CuSO4; FeCl3+NaOH; ZnCl2+K2Cr04; NaCO3+ HCl; CuSO4+NaOH; BaCl2+K2CrO4; CuSO4+K2CrO4; ZnCl2+NaOH. Спасибо!
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