CH-713
Rate experiments
Chemistry · Secondary 3 · Hard · Rate experiments
A reaction between zinc and excess dilute sulfuric acid produces hydrogen gas. The total volume of gas collected increases quickly at first, then becomes constant. Which statement best explains why the volume stops increasing?
- All the sulfuric acid has been used up
- The zinc has completely dissolved
- Hydrogen gas no longer escapes from the apparatus
- The temperature of the reaction mixture becomes zero
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