CH-719
Concentration and pressure
Chemistry · Secondary 3 · Medium · Concentration and pressure
A gas syringe is used to measure the rate of reaction between excess zinc and 1.0 mol dm⁻³ hydrochloric acid at room conditions. Which change will increase the initial rate of hydrogen gas production?
- Using larger pieces of zinc instead of powder
- Cooling the reaction mixture in an ice bath
- Using 2.0 mol dm⁻³ hydrochloric acid instead of 1.0 mol dm⁻³
- Collecting the gas over water instead of in a gas syringe
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