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Kent56789
@Kent56789
November 2021
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Определите pH насыщенного раствора указанного гидроксида при температуре 25 Цельсия Mn(OH)2
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mrvladimir2
Verified answer
ПР(Mg(OH)2)= 1,47*10⁻¹¹
Примем растворимость Mg(OH)2 равной а, тогда
[Mg²⁺] = a
[OH⁻] = 2a
ПР/4=
[OH⁻] = 2a= 1.54*10⁻⁴*2 = 3.08*10⁻⁴
pOH = -lg3.08*10⁻⁴ = 3.51
pH = 14 - 3.51 = 10.49
Ответ: 10,49
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Answers & Comments
Verified answer
ПР(Mg(OH)2)= 1,47*10⁻¹¹Примем растворимость Mg(OH)2 равной а, тогда
[Mg²⁺] = a
[OH⁻] = 2a
ПР/4=
[OH⁻] = 2a= 1.54*10⁻⁴*2 = 3.08*10⁻⁴
pOH = -lg3.08*10⁻⁴ = 3.51
pH = 14 - 3.51 = 10.49
Ответ: 10,49