Experimental Design
8 past-paper questions on Experimental Design · examined 2020–2025.
20252 questions
Plan an experiment to determine which metal, magnesium or zinc, releases more thermal energy per gram of metal when reacting with excess dilute sulfuric acid.
Plan an experiment to determine which metal, magnesium or zinc, releases more thermal energy per gram of metal when reacting with excess dilute sulfuric acid.
20233 questions
State and explain why a plastic cup rather than a metal cup is used in these experiments.
Plan an investigation to show which of two different samples of baking soda has been stored for longer. Your plan should include the use of common laboratory apparatus and the two samples of baking soda. No other chemicals should be used.
Plan an investigation to show which of two different samples of baking powder has been stored for longer.
20212 questions
State three variables that must be kept constant for the experiments.
Suggest why different masses of each metal are used for the four experiments.
20201 question
State a variable that needs to be kept constant in each experiment.
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