Topic: Rate of Reaction
A student adds 3 g of magnesium ribbon to 50 cm³ of 1 M HCl. The volume of hydrogen gas is recorded every 10 seconds.
(a) Sketch a graph of gas volume vs. time.
(b) Explain why the rate decreases after 40 seconds.
(c) How would using 2 M HCl affect the initial rate? Explain.
(Marking scheme provides points on collision theory, concentration effect, and curve shape.) chemistry question bank aristo.zip
Chemistry textbooks can be dense. The Aristo question bank is famous for breaking down complex concepts—like Organic Chemistry reaction mechanisms or Coordination Compounds—into bite-sized, digestible questions. It strips away the fluff and focuses on what you need to know to pass. Chemistry Question Bank — Aristo