Amylase catalyses the breakdown of starch into sugars.
A student mixes 10 cm310\,\mathrm{cm^{3}}10cm3 of starch solution with amylase at 20 ∘C20\,^\circ\mathrm{C}20∘C. The student repeats the experiment at 30 ∘C30\,^\circ\mathrm{C}30∘C, using the same volume and concentration of starch solution and the same amount of amylase. Each reaction is allowed to finish.
Which result would be observed at 30 ∘C30\,^\circ\mathrm{C}30∘C compared with the result at 20 ∘C20\,^\circ\mathrm{C}20∘C?
The initial rate increases and the total amount of sugars formed stays the same
The initial rate decreases and the total amount of sugars formed increases
The initial rate decreases and the total amount of sugars formed stays the same
The initial rate increases and the total amount of sugars formed increases
122 exam-style questions on OCR GCSE Chemistry 5.2 Controlling reactions, covering 5.2.1 Measuring and interpreting rate of reaction, 5.2.2 Factors affecting rate and collision theory, and 5.2.3 Catalysts, activation energy and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.