CH-1370
Collecting gases
Chemistry · Secondary 4 · Medium · Collecting gases
A student wants to measure the rate of reaction between excess zinc powder and dilute sulfuric acid by collecting the hydrogen gas produced. Which method would allow him to follow the rate correctly?
- Measure the total volume of hydrogen after the reaction has finished.
- Record the decrease in mass of the flask after 10 minutes only.
- Measure the volume of hydrogen collected in a gas syringe every 20 seconds.
- Record the temperature of the mixture before and after the reaction.
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