Предмет: Химия, автор: danzakh82

Яку масу води треба взяти для реакції з 5 г фосфор(V) оксидом, як- що в результаті реакції утворюється ортофосфатна кислота?​

Ответы

Автор ответа: ygrik1106
0

Ответ:

Реакція між фосфор(V) оксидом (P4O10) та водою (H2O) дає ортофосфатну кислоту (H3PO4):

P4O10 + 6H2O → 4H3PO4

Для цієї реакції потрібно 6 молекул води на кожну молекулу P4O10. Молекулярна маса P4O10 дорівнює 284 г/моль, тому 5 г P4O10 містить 5/284 моль, або 0,018 моль.

Таким чином, для реакції з 5 г P4O10 потрібно:

0,018 моль P4O10 × 6 моль H2O/моль P4O10 × 18 г/моль H2O = 1,94 г H2O

Отже, треба взяти близько 1,94 г води для реакції з 5 г фосфор(V) оксиду.

Объяснение:

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