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bon1101
bon1101
19.02.2021 19:12 •  Химия

Ка­кие ре­ак­ции про­те­ка­ют на элек­тро­дах при элек­тро­ли­зе гидр­ок­си­да на­трия NaOH: а) в рас­плав­лен­ном со­сто­я­нии; б) в вод­ном рас­тво­ре? На­пи­ши­те урав­не­ния ре­ак­ций.

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Ответ:
Maksim777900
Maksim777900
16.01.2022 06:50

Дур*

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Must Waste More Time...

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Ответ:
elka1245
elka1245
12.06.2022 01:57

CIVII20II7

Объяснение:

определим валентность хлора в его соединении с кислородом — Cl2O7.

 

1. Записываем известную валентность кислорода над формулой. Неизвестную валентность обозначаем буквой x:

 

Clx2OII7.

 

2. Находим сумму единиц валентности каждого элемента. Для этого его валентность умножаем на число атомов:

 

x⋅2=2⋅7.

 

3. Вычисляем x:

 

2x=14,x=14:2=7.

 

Валентность хлора равна VII:

 

ClVII2OII7.

Составление формулы бинарного соединения по валентностям химических элементов

Если известны валентности двух элементов, то можно составить формулу их соединения.

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