Question

Please help ! )))) How many mol orthophosphate acids can be obtained from 6.2 grams of phosphorus?

Answer 1

Дано:
m (P) = 6,2г
n (H3PO4) - ?

2P ⠀ + ⠀ 8H2O = 2H3PO4 + 5H2
n=2моль⠀ ⠀ ⠀ ⠀ n=2моль
M=31г/моль⠀ ⠀ ⠀М=98г/моль

1) n (P) = 6,2/31 = 0,2 моль
2) n (H3PO4) = n (P) = 0,2 моль
Ответ: 0,2моль

©OAR

Answer 2

To determine the number of moles of orthophosphoric acid that can be obtained from 6.2 grams of phosphorus, we need to know the balanced chemical equation for the reaction involved. Orthophosphoric acid is also known as phosphoric acid and has the chemical formula H3PO4.

The balanced chemical equation for the reaction between phosphorus and oxygen to form phosphoric acid is:

4 P + 5 O2 → P4O10 P4O10 + 6 H2O → 4 H3PO4

From the equation, we can see that 4 moles of phosphorus react to produce 4 moles of orthophosphoric acid (H3PO4).

Now, let's calculate the number of moles of phosphorus in 6.2 grams using its molar mass:

Molar mass of phosphorus (P) = 30.97 g/mol

Number of moles of phosphorus = Mass of phosphorus / Molar mass of phosphorus Number of moles of phosphorus = 6.2 g / 30.97 g/mol ≈ 0.200 moles

Since 4 moles of phosphorus react to produce 4 moles of orthophosphoric acid, we can conclude that 0.200 moles of phosphorus will produce an equal number of moles of orthophosphoric acid.

Therefore, 0.200 moles of orthophosphoric acid can be obtained from 6.2 grams of phosphorus.