CH-716
Concentration and pressure
Chemistry · Secondary 3 · Medium · Concentration and pressure
A student reacts excess magnesium with dilute hydrochloric acid and measures the volume of hydrogen gas produced every 20 s. Which change will increase the initial rate of reaction?
- Using a more concentrated hydrochloric acid solution.
- Using larger pieces of magnesium ribbon.
- Cooling the reaction mixture in an ice bath.
- Using a smaller volume of the same concentration of acid.
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