Question

Как находить валентности кислот? то есть: валентность H - I, PO4 - 3, но HPO4 имеет II валентность.

Answer 1

Ответ: Всё верно

Объяснение:

Потому что у НРО4 одна из трёх валентностей РО4 занята Н, поэтому свободных валентностей остаётся две. Аналогично у Н2РО4 валентность будет 1.

Answer 2

Finding the Valence of Acids

To determine the valence of acids, you need to consider the chemical formula of the acid and the charges of its constituent elements. The valence of an element refers to its combining power or the number of electrons it can gain, lose, or share when forming chemical compounds.

Let's take a look at the examples you provided:

1. H (Hydrogen): The valence of hydrogen can vary depending on the compound it is part of. In general, hydrogen has a valence of +1 when it forms a compound with nonmetals and a valence of -1 when it forms a compound with metals. However, it's important to note that the valence of hydrogen can be different in certain compounds.

2. PO4 (Phosphate): The phosphate ion (PO4) has a valence of -3. This means that it can combine with three positively charged ions or gain three electrons to achieve a stable configuration.

3. HPO4 (Hydrogen Phosphate): The hydrogen phosphate ion (HPO4) has a valence of -2. This means that it can combine with two positively charged ions or gain two electrons to achieve a stable configuration.

It's important to note that the valence of an element can vary depending on the specific compound it is part of. In the case of HPO4, the valence of hydrogen is different compared to when it is part of other compounds.

Please let me know if there's anything else I can help you with!