Question

Химия 8 класс 23(3) Каким из оксидов, формулы которых – CrO, Cl2O7, К2О, СО2, СаО, SO3, соответствуют основания? Запишите формулы соответствующих оснований. прошу проверить решение: Формула оснавание это Ме(OH)n Из этих CrO,CaO,CO2 я должен быть уверен на 100% что это правильный ответ

Answer 1

Ответ:

Cr(OH)₂

KOH

Ca(OH)₂

Объяснение:

Основным оксидам соответствуют основания.

Остальные оксиды из приведенных кислотные. Им соответствуют кислоты.

Answer 2

Oxides and Bases in Chemistry

In chemistry, oxides are compounds that contain oxygen bonded to another element. Bases, on the other hand, are substances that can accept protons (H+) or donate electron pairs. Let's examine the given oxides and determine which ones correspond to bases.

1. CrO (Chromium(II) oxide): Chromium(II) oxide is not a base. It is an oxide of chromium with a +2 oxidation state. It does not have the ability to accept protons or donate electron pairs to act as a base.

2. Cl2O7 (Dichlorine heptoxide): Dichlorine heptoxide is not a base. It is a covalent compound composed of two chlorine atoms and seven oxygen atoms. It is a powerful oxidizing agent but does not have the properties of a base.

3. K2O (Potassium oxide): Potassium oxide is a base. It is an ionic compound composed of potassium cations (K+) and oxide anions (O2-). When dissolved in water, it dissociates to form hydroxide ions (OH-) and can therefore act as a base.

4. CO2 (Carbon dioxide): Carbon dioxide is not a base. It is a covalent compound composed of one carbon atom and two oxygen atoms. It does not have the ability to accept protons or donate electron pairs to act as a base.

5. CaO (Calcium oxide): Calcium oxide is a base. It is an ionic compound composed of calcium cations (Ca2+) and oxide anions (O2-). When dissolved in water, it dissociates to form hydroxide ions (OH-) and can therefore act as a base.

6. SO3 (Sulfur trioxide): Sulfur trioxide is not a base. It is a covalent compound composed of one sulfur atom and three oxygen atoms. It is a powerful Lewis acid but does not have the properties of a base.

Based on the given oxides, the formulas of the corresponding bases are KOH (potassium hydroxide) and Ca(OH)2 (calcium hydroxide). These bases are formed when the oxides react with water, releasing hydroxide ions.

Please note that the formula for bases is generally written as MOH or M(OH)2, where M represents a metal cation. However, in the case of potassium oxide (K2O) and calcium oxide (CaO), the corresponding bases are written as KOH and Ca(OH)2, respectively, to indicate the presence of multiple hydroxide ions.

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