Question

Дан ряд формул некоторых элементов соединений с фтором:: CuF2, SF6 ЗА 5 SiF4. Определите валентности элементов и составьте формулы их соединений с кислородом,в которых валентность этих элементов будет такая же как и в соединениях с фтором

Answer 1

Валентности- CuF2- 2, SF6- 6,SiF4- 4
c кисородом-  CuО, SO3,   SiO2 

Answer 2

Valence of Elements in Compounds with Fluorine

The given series of formulas for compounds with fluorine are: CuF2, SF6, and SiF4. We need to determine the valence of the elements in these compounds and then create formulas for their compounds with oxygen, where the valence of these elements will be the same as in the compounds with fluorine.

Let's analyze each compound and determine the valence of the elements:

1. CuF2: - Copper (Cu) is a transition metal, and its valence can vary. In this compound, the valence of copper is +2. - Fluorine (F) is a halogen, and its valence is -1.

2. SF6: - Sulfur (S) is a nonmetal, and its valence can vary. In this compound, the valence of sulfur is +6. - Fluorine (F) is a halogen, and its valence is -1.

3. SiF4: - Silicon (Si) is a metalloid, and its valence can vary. In this compound, the valence of silicon is +4. - Fluorine (F) is a halogen, and its valence is -1.

Now, let's create formulas for compounds with oxygen, where the valence of these elements will be the same as in the compounds with fluorine:

1. Copper (Cu): - The valence of copper in CuF2 is +2. - To create a compound with oxygen, we need to find an oxidation state of copper that is also +2. One such compound is copper(II) oxide (CuO).

2. Sulfur (S): - The valence of sulfur in SF6 is +6. - To create a compound with oxygen, we need to find an oxidation state of sulfur that is also +6. One such compound is sulfur hexoxide (SO6).

3. Silicon (Si): - The valence of silicon in SiF4 is +4. - To create a compound with oxygen, we need to find an oxidation state of silicon that is also +4. One such compound is silicon dioxide (SiO2).

Therefore, the formulas for compounds with oxygen, where the valence of these elements will be the same as in the compounds with fluorine, are:

- Copper: CuO - Sulfur: SO6 - Silicon: SiO2

Please note that the compounds mentioned above are hypothetical examples based on the given valence states. The actual compounds formed by these elements with oxygen may vary depending on other factors and conditions.