Question

Задание 5. Валентность. Определите валентность элементов в веществах: NaCl, H20, FeCl3, MnO2.​

Answer 1

Ответ:

у Na- максимальна валентність 1 , а у CI - максимальна валентність 7.

H2O - У Н - 1 , у О - 2

FeCI3 - не знаю

MnO2 - O = 2 , MN - 1

Объяснение

Вот как-

то так

Answer 2

Valence of Elements in Substances

The valence of an element refers to its combining capacity or the number of electrons an atom of that element can gain, lose, or share to form chemical bonds with other atoms. Let's determine the valence of the elements in the following substances:

1. Sodium Chloride (NaCl): - Sodium (Na) is a group 1 element and typically has a valence of +1. - Chlorine (Cl) is a group 17 element and typically has a valence of -1. - Therefore, in NaCl, sodium has a valence of +1, and chlorine has a valence of -1.

2. Water (H2O): - Hydrogen (H) is a group 1 element and typically has a valence of +1. - Oxygen (O) is a group 16 element and typically has a valence of -2. - Therefore, in H2O, hydrogen has a valence of +1, and oxygen has a valence of -2.

3. Iron(III) Chloride (FeCl3): - Iron (Fe) is a transition metal and can have multiple valence states. In this case, it is in the +3 valence state. - Chlorine (Cl) is a group 17 element and typically has a valence of -1. - Therefore, in FeCl3, iron has a valence of +3, and chlorine has a valence of -1.

4. Manganese(IV) Dioxide (MnO2): - Manganese (Mn) is a transition metal and can have multiple valence states. In this case, it is in the +4 valence state. - Oxygen (O) is a group 16 element and typically has a valence of -2. - Therefore, in MnO2, manganese has a valence of +4, and oxygen has a valence of -2.

In summary: - NaCl: Sodium has a valence of +1, and chlorine has a valence of -1. - H2O: Hydrogen has a valence of +1, and oxygen has a valence of -2. - FeCl3: Iron has a valence of +3, and chlorine has a valence of -1. - MnO2: Manganese has a valence of +4, and oxygen has a valence of -2.

I hope this helps! Let me know if you have any further questions.