Запишите уравнения реакций соединения, протекающих согласно схемам:

Cr⇒CrCl₃⇒Cr(OH)₃⇒Cr(SO₄)₃
Ba⇒BaCl₂⇒Ba(NO₃)₂⇒Ba(NO₂)₂⇒Ba(OH)₂
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