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Рассчитайте, какую массу оксида калия и воды надо взять для получения 150 г раствора гидроксида калия с массовой долей 0,04?
Ответы 1
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K₂O+H₂O=2KOHm(KOH)=0,04*150=6 гn(KOH)=m/M=6/56=0,1 мольn(K₂O)=0,1/2=0,05 мольm(K₂O)=0,05*94=4,7 гm(H₂O)=150-4,7=145,3 г
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Автор:
mikeellison - 5 лет назад
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