Пользуясь алгоритмом составьте формулы по валентности NIII…H… PIII…O… Ca…NIII… Mg...O... HgI...O… Li…SII… Ba…SII… SVI…O… Ag…NIII… MnIV…O… Алгоритм составления формул по валентности 1. Записать хим. знаки и указать валентность элементов (постоянную или указанную в задании). 2. Найти наименьшее общее кратное и записать под чертой. 3. Разделить наименьшее общее кратное на валентность каждого элемента и результат записать в виде индексов.
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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