Предмет: Химия, автор: lyrew

Определите молярную концентрацию хлорида натрия в растворе с
массовой долей 50 % (ρ = 1,2585 г/см3)

Ответы

Автор ответа: fomenkinho
1

Дано

w(NaCl) = 50% = 0.5

p = 1.2585 г/см3 = 1258.5 г/дм3

Решение

M(NaCl) = Ar(Na) + Ar(Cl) = 23 + 35.5 = 58.5 г/моль

Cm = pw(NaCl) / M(NaCl) = 629.25 / 58.5 = 10.76 моль/дм3

Ответ: 10.76 моль/дм3

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