CH-1685
Temperature and rate
Chemistry · Secondary 4 · Medium · Temperature and rate
A student reacts excess magnesium with 1.0 mol/dm³ hydrochloric acid and measures the time taken to collect 20 cm³ of hydrogen gas. Which change will decrease the time taken to collect 20 cm³ of gas?
- Increase the temperature of the acid.
- Use larger pieces of magnesium ribbon.
- Dilute the acid to 0.5 mol/dm³.
- Use half the volume of acid.
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.