CH-1981
Percentage yield and purity
Chemistry · Secondary 4 · Hard · Percentage yield and purity
A student decomposes 15.0 cm³ of 1.00 mol/dm³ aqueous hydrogen peroxide at room temperature and pressure.
2H₂O₂(aq) → 2H₂O(l) + O₂(g)
The volume of oxygen collected is 135 cm³.
What is the percentage yield of oxygen?
(1 mol of gas occupies 24 000 cm³ at r.t.p.)
2H₂O₂(aq) → 2H₂O(l) + O₂(g)
The volume of oxygen collected is 135 cm³.
What is the percentage yield of oxygen?
(1 mol of gas occupies 24 000 cm³ at r.t.p.)
- 37.5 %
- 56.3 %
- 66.7 %
- 75.0 %
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