The breakdown of hydrogen peroxide to water and oxygen is catalysed by the enzyme catalase.
In an investigation into the effect of pH on the rate of reaction of catalase, potato cubes were added to hydrogen peroxide.
Which dependent variable should be recorded?
1 )
the change in mass of the potato after a given time
2 )
the pH of the solution at regular time intervals
3 )
the number of potato cubes added at the start
the volume of oxygen given off at regular time intervals
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