When 14.2 g of phosphorus (V) oxide interacts with water, orthophosphoric acid is formed with a mass of …
| February 4, 2021 | education
Given:
m (P2O5) = 14.2 g
To find:
m (H3PO4) -?
Decision:
1) P2O5 + 3H2O => 2H3PO4;
2) n (P2O5) = m (P2O5) / M (P2O5) = 14.2 / 142 = 0.1 mol;
3) n (H3PO4) = n (P2O5) * 2 = 0.1 * 2 = 0.2 mol;
4) m (H3PO4) = n (H3PO4) * M (H3PO4) = 0.2 * 98 = 19.6 g.
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