Question

З якими речовинами реагує CaO?​

Answer 1

Ответ:

відповідь : солі та води

Answer 2

Ответ:

Вода

Объяснение:

Оксид кальция - основный оксид.

Он будет реагировать с водой, поскольку негашеная известь *оксид кальция* - оксид активного (щелочноземельного металла, будет реагировать с соляной кислотой

Answer 3

CaO, also known as calcium oxide or quicklime, is a highly reactive chemical compound. It reacts with various substances, including:

1. Water (Hydration): CaO reacts vigorously with water to form calcium hydroxide (Ca(OH)2). This reaction is exothermic, releasing heat, and is often used in the preparation of cement and lime mortar.

   CaO + H2O → Ca(OH)2

2. Acids: Calcium oxide reacts with acids to produce calcium salts and water. For example, with hydrochloric acid (HCl):

   CaO + 2HCl → CaCl2 + H2O

3. Carbon dioxide: Calcium oxide reacts with carbon dioxide (CO2) to form calcium carbonate (CaCO3), a common process used to remove CO2 from industrial flue gases.

   CaO + CO2 → CaCO3

4. Ammonia: Calcium oxide reacts with ammonia (NH3) to form calcium nitride (Ca3N2) and water.

   3CaO + 2NH3 → Ca3N2 + 3H2O

5. Sulfur dioxide: Calcium oxide reacts with sulfur dioxide (SO2) to form calcium sulfite (CaSO3).

   CaO + SO2 → CaSO3

6. Phosphoric acid: Calcium oxide reacts with phosphoric acid (H3PO4) to form calcium phosphate (Ca3(PO4)2).

   3CaO + 2H3PO4 → Ca3(PO4)2 + 3H2O

These are just some examples of the reactions involving calcium oxide. It is crucial to handle CaO with care due to its strong reactivity with water and acids, as it can cause burns and irritation.