Question

HNO 3 + P + H 2 O → H 3 PO 4 + NO 2

Answer 1

Ответ:

P(красн.) + 5HNO3(конц.) = H3PO4 + 5NO2 + H2O

Восстановление:

NO3− + 2H+ + 1e− = NO2 + H2O  

Окисление:

P + 4H2O − 5e− = PO43− + 8H+  

5NO3− + 2H+ + P = 5NO2 + H2O + PO43−

Answer 2

The chemical equation you've provided represents a reaction between nitric acid (HNO3) and phosphorus (P) in the presence of water (H2O). The reaction yields phosphoric acid (H3PO4) and nitrogen dioxide (NO2) as products. Here's the balanced chemical equation for this reaction:

3 HNO3 + P + 3 H2O → H3PO4 + 3 NO2

This balanced equation ensures that the same number of each type of atom is present on both sides of the equation, which follows the law of conservation of mass in chemical reactions. In this case, 3 molecules of nitric acid react with 1 molecule of phosphorus to produce 1 molecule of phosphoric acid and 3 molecules of nitrogen dioxide.