Chemistry · Chapter 9: Rate graphs and experiments
Year 11 Science · About 15 minutes with activities · Turn your sound on
Chapter 9 recap
- Rate graphs: steep at the start (lots of reactant particles, frequent collisions), less steep as reactants are used up, flat (gradient = 0) when the reaction stops.
- Changes: higher concentration, temperature, surface area or a catalyst → steeper start, finishes sooner, same final volume. More reactant → more product.
- Experiments: mass is conserved. Read scales at eye level. Repeat until 3 trials are concordant; record outliers but leave them out of the average. Precise = close together; accurate = close to the true value.
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