November 2021 0 25 Report
Сокращённое ионное уравнение 2Н+ + S2– = Н2S
соответствует взаимодействию веществ
1)НCl и Na2S
2)H2SO4 и Na2SO3
3)Н2SiO3 и BaS
4)(NH4)2S и NaOH
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