Предмет: Химия, автор: Worteti2263

До розчину масою 500г із масовою часткою калій гідроксиду 30% додали калій гідроксид масою 40г . Якою буде масова частка лугу в новому розчині

Ответы

Автор ответа: advukrain
0

Ответ:

35,2%

Объяснение:

Спочатку потрібно визначити масу калій гідроксиду в початковому розчині:

маса КОН = 500 г * 0,3 = 150 г

Додавши 40 г КОН, маса КОН у розчині становитиме:

150 г + 40 г = 190 г

Тепер можна визначити масову частку КОН у новому розчині:

масова частка КОН = (маса КОН / загальна маса розчину) * 100%

загальна маса розчину = 500 г + 40 г = 540 г

масова частка КОН = (190 г / 540 г) * 100% ≈ 35,2%

Отже, масова частка лугу в новому розчині становитиме близько 35,2%.

Автор ответа: blookb148
0

Ответ:

m1=500,г

w1=30%=0,3

+m=30г

w2-?

Объяснение:

если я ошибаюсь то простите.

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