The variable you deliberately change is the
Salam Academy Original Practice · Proposed mark scheme
Practise
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12 questions
A risk assessment identifies
Salam Academy Original Practice · Proposed mark scheme
Investigating how concentration affects rate, a controlled variable is
Salam Academy Original Practice · Proposed mark scheme
Measured ΔH = −52.0 kJ mol⁻¹; accepted value −57.1 kJ mol⁻¹. Calculate the % error.
Salam Academy Original Practice · Proposed mark scheme
Repeating an experiment and averaging reduces
Salam Academy Original Practice · Proposed mark scheme
A thermometer that always reads 1 °C too high causes
Salam Academy Original Practice · Proposed mark scheme
A gradient should be calculated using
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A line of best fit passes through (0.0020, 6.0) and (0.0030, 1.0). Calculate the gradient.
Salam Academy Original Practice · Proposed mark scheme
A specific improvement to reduce heat loss in calorimetry is
Salam Academy Original Practice · Proposed mark scheme
On a graph, the independent variable is plotted on the
Salam Academy Original Practice · Proposed mark scheme
Percentage uncertainties: pipette 0.24%, burette 0.40%, balance 0.10%. Calculate the total % uncertainty in the result.
Salam Academy Original Practice · Proposed mark scheme
% error is 9% and total % uncertainty is 2%. This suggests
Salam Academy Original Practice · Proposed mark scheme