An experiment is performed to determine how concentration affects the rate of reaction. In each of four trials, equal volumes of solution A and solution B are mixed while temperature and pressure are held constant. The concentration of solution B is held constant, but the concentration of solution A is varied. The concentration of solution A and the time for the reaction to go to completion for each trial are recorded in the data table below.

72 Describe the relationship between the concentration of solution A and the time for the reaction to go to completion. [1]

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73 On the grid in your answer booklet, mark an appropriate scale on the axis labeled “Reaction Time (s).” [1]

74 On the same grid, plot the data from the data table. Circle and connect the points. [1]

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75 Identify one factor, other than the concentration of the solutions, that can affect the rate of this reaction. [1]

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