Question

Как из оксида кальция можно получить азотную кислоту?( Пожалуйста, помогите!

Answer 1

CaO+N2O5 = Ca(NO3)2
3Ca(NO3)2+2H3PO4=Ca3(PO4)2↓+6HNO3

Answer 2

Obtaining Nitric Acid from Calcium Oxide

To obtain nitric acid from calcium oxide, a multi-step process involving several chemical reactions is required. Here's a detailed explanation of the process:

1. Formation of Calcium Nitrate (Ca(NO3)2): - Calcium oxide (CaO) reacts with nitric acid (HNO3) to form calcium nitrate (Ca(NO3)2) and water (H2O) as per the following equation: ``` CaO + 2HNO3 → Ca(NO3)2 + H2O ``` - This reaction is a typical acid-base reaction where calcium oxide, a base, reacts with nitric acid, an acid, to form a salt (calcium nitrate) and water.

Source: 2. Conversion of Calcium Nitrate to Calcium Nitrate Tetrahydrate: - The calcium nitrate obtained from the previous step can be further processed to obtain calcium nitrate tetrahydrate (Ca(NO3)2·4H2O) by crystallization.

Source: 3. Dehydration of Calcium Nitrate Tetrahydrate: - The calcium nitrate tetrahydrate is then dehydrated to produce calcium nitrate anhydrous (Ca(NO3)2) by heating it to a specific temperature to remove the water molecules.

Source: 4. Formation of Nitric Acid: - Finally, the calcium nitrate anhydrous is subjected to a chemical reaction to produce nitric acid. This can be achieved by reacting calcium nitrate with concentrated sulfuric acid (H2SO4) to form nitric acid and calcium sulfate (CaSO4).

Source: In summary, the process involves the initial reaction of calcium oxide with nitric acid to form calcium nitrate, followed by further processing to obtain calcium nitrate anhydrous, which is then reacted with sulfuric acid to produce nitric acid.

I hope this helps! If you have further questions or need additional information, feel free to ask!