Tungsten can be extracted from tungsten oxide, WO3\text{WO}_3WO3, by reaction with hydrogen.
150 tonnes of tungsten oxide was heated in a stream of hydrogen gas. The tungsten formed in the reaction was separated and purified. The mass of tungsten was then determined.
The results are shown in Table 1.
Use the information in Table 1 to calculate the percentage yield of tungsten in this process.
percentage yield=actual yieldtheoretical yield×100 \text{percentage yield} = \frac{\text{actual yield}}{\text{theoretical yield}} \times 100 percentage yield=theoretical yieldactual yield×100Give your answer to 1 decimal place.
Table 1
| Mass in tonnes | |
|---|---|
| Mass of tungsten oxide | 150.00 |
| Mass of tungsten produced | 92.40 |
| Theoretical mass of tungsten formed | 119.00 |
Practise Edexcel GCSE Chemistry Quantitative analysis with exam-style questions for Foundation and Higher tier. 119 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
