Что будет когда к стиральному порошку додать фенолфталеин?

малиновая окраска. т.к. в воде идет гидролиз стир поршка с образованеием гидроксиданионов

1 Задача. m(NaI) = 1,5 г

2 Задача. m(NaI) = 18,75 г

3 Задача. m(NaI) = 375 г

Объяснение:

NaI - йодид натрия

n - кол-во вещества

m - масса

Тут 3 задачи

1 ЗАДАЧА

Дано :

n(NaI) = 0,01 моль

Найти :

m(NaI) - ?

m = n*M

M(NaI) = 23+127 = 150 г/моль

m(NaI) = 0,01 моль * 150 г/моль = 1,5 г

m(NaI) = 1,5 г

ответ : m(NaI) = 1,5 г

2 ЗАДАЧА

Дано :

n(NaI) = 0,125 моль

Найти :

m(NaI) - ?

m = n*M

M(NaI) = 23+127 =

m(NaI) = 0,125 моль * 150 г/моль = 18,75 г

m(NaI) = 18,75 г

ответ : m(NaI) = 18,75 г

3 ЗАДАЧА

Дано :

n(NaI) = 2,5 моль

Найти :

m(NaI) - ?

m = n*M

M(NaI) = 23+127 =

m(NaI) = 2.5 моль * 150 г/моль = 375 г

m(NaI) = 375 г

ответ : m(NaI) = 375 г

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