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Консультация № 188937
14.03.2016, 00:29
0.00 руб.
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1
1
Здравствуйте! У меня возникли сложности с таким вопросом:
Под влиянием каких ионов метилоранж принимает розовую окраску в 0,1н растворе уксусной кислоты. Сравнить окраску раствора( уксусная кислота + метилоранж+ ацетат натрия ) с вышеприведенным раствором.На изменение концентрации каких ионов указывает изменение окраски метилоранжа.
Под влиянием каких ионов метилоранж принимает розовую окраску в 0,1н растворе уксусной кислоты. Сравнить окраску раствора( уксусная кислота + метилоранж+ ацетат натрия ) с вышеприведенным раствором.На изменение концентрации каких ионов указывает изменение окраски метилоранжа.
Обсуждение
14.03.2016, 01:03
общий
это ответ
Здравствуйте, samstep.stepanov!
Метилоранж краснеет в кислой среде, присоединяя ион водорода - окраска индикатора определяется концентрацией [H+]
При добавлении к уксусной кислоте ацетата натрия концентрация ионов водорода уменьшается и индикатор меняет цвет. Цвет метилоранжа меняется в интервале pH 3,1-4,4, тем временем как для уксусной кислоты pKa=4,76. Таким образом, при добавлении к раствору уксусной кислоты сходного количества ацетата метилоранж станет полностью жёлтым.
Метилоранж краснеет в кислой среде, присоединяя ион водорода - окраска индикатора определяется концентрацией [H+]
При добавлении к уксусной кислоте ацетата натрия концентрация ионов водорода уменьшается и индикатор меняет цвет. Цвет метилоранжа меняется в интервале pH 3,1-4,4, тем временем как для уксусной кислоты pKa=4,76. Таким образом, при добавлении к раствору уксусной кислоты сходного количества ацетата метилоранж станет полностью жёлтым.
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