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Paper 3Theory (Core)1 marks
A student conducts an experiment to measure the rate of reaction between hydrochloric acid and sodium thiosulfate.
Data Table
Rate of Reaction Data
The table shows the time taken for the solution to turn cloudy at different concentrations of sodium thiosulfate.
| Concentration (mol/dm³) | Time (seconds) |
|---|---|
| 0.1 | 60 |
| 0.2 | 30 |
| 0.3 | 20 |
| 0.4 | 15 |
- a[1]
State the trend observed in the data regarding concentration and time.
Aim for approximately 1 distinct marking point.
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