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Консультация № 193168
30.04.2018, 17:12
0.00 руб.
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Здравствуйте! У меня возникли сложности с таким вопросом:
Смесь хлороводородной и борной кислот оттитровали потенциометрически 0,1000 М последовательно: сначала оттитровали НСl (израсходовав объем титранта V1), затем прибавили к раствору глицерин и оттитровали Н3ВО3 по первой ступени (получив суммарный объем титранта V2). Построить кривые титрования в координатах рН-V и ΔpH/ΔV-V, определить объемы V1 и V2 и рассчитать концентрации (г/л) хлороводородной и борной кислот, если для анализа было взято 20,00 мл смеси кислот и при титровании получены следующие данные:
V(NаОН),мл....0,00 0,20 0,30 0,40 0,46 0,50 0,55 0,60 прибавили
рН....... 2,60 2,84 3,02 3,40 3,95 5,58 7,03 7,38 глицерин
V(NаОН),мл...0,80 1,00 1,20 1,40 1,45 1,50 1,55 1,60 1,70
рН 5,95 6,25 6,55 7,04 7,28 7,73 8,55 9,10 9,55
Смесь хлороводородной и борной кислот оттитровали потенциометрически 0,1000 М последовательно: сначала оттитровали НСl (израсходовав объем титранта V1), затем прибавили к раствору глицерин и оттитровали Н3ВО3 по первой ступени (получив суммарный объем титранта V2). Построить кривые титрования в координатах рН-V и ΔpH/ΔV-V, определить объемы V1 и V2 и рассчитать концентрации (г/л) хлороводородной и борной кислот, если для анализа было взято 20,00 мл смеси кислот и при титровании получены следующие данные:
V(NаОН),мл....0,00 0,20 0,30 0,40 0,46 0,50 0,55 0,60 прибавили
рН....... 2,60 2,84 3,02 3,40 3,95 5,58 7,03 7,38 глицерин
V(NаОН),мл...0,80 1,00 1,20 1,40 1,45 1,50 1,55 1,60 1,70
рН 5,95 6,25 6,55 7,04 7,28 7,73 8,55 9,10 9,55
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