Формулы веществ,изменяющих окраску метилоранжа в красный цвет, записаны в ряду: a) HClO3,BaCl2,KOH б)HCl, H2SO4, HNO3 в)H3PO4, mg(NO3)2, NaOH г)H2S, HF, CA(OH)2
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