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Edexcel GCSE Chemistry Calculations

Calculations

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Amount of product gained or amount of reactant lost can be used to calculate the rate of reaction and draw graphs to represent its change.

Rate of reaction

These graphs can be produced from data sets acquired during practical experiments. Remember when calculating rate of reaction time should be in seconds.

Rate of reaction

The rate of reaction of an experiment is given by the gradient of its graph by finding the change in the mass or the volume of the reactants used or products used per unit time.

Rate of reaction

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What factors may influence this graph changing from black to blue line? The graph represents the reaction 2NO(g) + Oβ‚‚(g) β†’ Nβ‚‚Oβ‚„(g).

Edexcel GCSE Chemistry Calculations What factors may influence this graph changing from black to blue line? The graph represents the reaction 2NO(g) + Oβ‚‚(g) β†’ Nβ‚‚Oβ‚„(g).
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2

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How can rate of reaction be calculated by measuring the volume of gas produced by a reactant mixture containing zinc and hydrochloric acid?

Edexcel GCSE Chemistry Calculations How can rate of reaction be calculated by measuring the volume of gas produced by a reactant mixture containing zinc and hydrochloric acid?
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3

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Draw a graph to show how the total volume of hydrogen gas produced would change throughout the course of a reaction between zinc and hydrochloric acid.

Edexcel GCSE Chemistry Calculations Draw a graph to show how the total volume of hydrogen gas produced would change throughout the course of a reaction between zinc and hydrochloric acid.
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4

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Draw a graph to show the impact of increasing temperature on the reaction between zinc and hydrochloric acid. There should be two lines on your graph, one for low temperature and one for high temperature.

Edexcel GCSE Chemistry Calculations Draw a graph to show the impact of increasing temperature on the reaction between zinc and hydrochloric acid. There should be two lines on your graph, one for low temperature and one for high temperature.
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5

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In an experiment between hydrochloric acid and potassium bicarbonate, the reaction mixture decreases in mass by 2.0 g in 3 minutes. What is the rate of reaction?

Edexcel GCSE Chemistry Calculations In an experiment between hydrochloric acid and potassium bicarbonate, the reaction mixture decreases in mass by 2.0 g in 3 minutes. What is the rate of reaction?
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6

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What would be an appropriate measurement for rate of reaction for this reaction: CaCO₃(s) + 2HCl(aq) β†’ CaClβ‚‚(aq) + Hβ‚‚O(l) + COβ‚‚(g) ?

Edexcel GCSE Chemistry Calculations What would be an appropriate measurement for rate of reaction for this reaction: CaCO₃(s) + 2HCl(aq) β†’ CaClβ‚‚(aq) + Hβ‚‚O(l) + COβ‚‚(g) ?
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7

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Calculate the initial rate of reaction for the graph shown. The initial rate can be found by a drawing a straight line drawn from the beginning of the reaction. Give your answer in g/s.

Edexcel GCSE Chemistry Calculations Calculate the initial rate of reaction for the graph shown. The initial rate can be found by a drawing a straight line drawn from the beginning of the reaction. Give your answer in g/s.
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8

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Why are you calculating 'average' rate of reaction?

Edexcel GCSE Chemistry Calculations Why are you calculating 'average' rate of reaction?
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