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Консультация № 194374
08.01.2019, 09:02
0.00 руб.
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Здравствуйте, Уважаемые эксперты помогите, пожалуйста, решить задачи:
1) На титрование раствора, содержащего 3,1580 г технического KOH, израсходовано 27,45 мл раствора HCl. Титр HCl по NаOH равен 0,07862. Вычислить массовую долю KOH в образце.
2) Какова должна быть равновесная концентрация NH3, чтобы растворить 0,0035 моль AgCl в 200 мл водного раствора NH3.
3) Навеску 0,1032 г Na2CO3 обработали 50 мл 0,09496 н раствора HCl, избыток кислоты оттитровали 24,8 мл 0.1 н раствора NaOH. Вычислить массовую долю примесей в образце.
4) Вычислить и сравнить растворимость сульфида меди (II) в г/100 г раствора:
а) воды;
б) 0,05 М хлористоводородной кислоты;
в) 0.1 М аммиака
1) На титрование раствора, содержащего 3,1580 г технического KOH, израсходовано 27,45 мл раствора HCl. Титр HCl по NаOH равен 0,07862. Вычислить массовую долю KOH в образце.
2) Какова должна быть равновесная концентрация NH3, чтобы растворить 0,0035 моль AgCl в 200 мл водного раствора NH3.
3) Навеску 0,1032 г Na2CO3 обработали 50 мл 0,09496 н раствора HCl, избыток кислоты оттитровали 24,8 мл 0.1 н раствора NaOH. Вычислить массовую долю примесей в образце.
4) Вычислить и сравнить растворимость сульфида меди (II) в г/100 г раствора:
а) воды;
б) 0,05 М хлористоводородной кислоты;
в) 0.1 М аммиака
Обсуждение
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