Предмет: Химия, автор: Rossawec

Оберіть ряд тільки амфотерних оксидів
1 балл
A. CaO, Fe2О3, ZnO
Б. Zn(OH)2, Pb(OH)2, Fe(OH)2
B. Al2O3, Cr2O3, BeO
Г. Sn(OH)2. Be(OH)2, Al(OH)3

Складіть рівняння між алюміній хлоридом і калій ортофосфатом у розчині і вкажіть суму коефіцієнтів у ньому?

Відносна густина невідомого газу за повітрям 1,52. Який об'єм матиме 0,48 кг цього газу?

Ответы

Автор ответа: krosnik80
0

Ответ:

1.Амфотерними оксидами називаються оксиди, які можуть взаємодіяти як з кислотами, так і з лугами. З ряду, що ви наводите, амфотерними оксидами є ряд (Г): Sn(OH)2, Be(OH)2, Al(OH)3.

2.Рівняння між алюміній хлоридом (AlCl3) і калій ортофосфатом (K3PO4) у розчині може бути таким:

2AlCl3 + 3K3PO4 -> AlPO4 + 6KCl

Сума коефіцієнтів у цьому рівнянні дорівнює 14.

3.Для розрахунку об'єму газу потрібно знати його молярну масу. Без цієї інформації не можливо точно визначити об'єм газу.

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6. What is the liability of partners for running a usual partnership?

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