Chemical Reaction Benchmark Questions

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What is a chemical reaction?

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A chemical reaction is a process in which substances (reactants) undergo a transformation to form new substances (products) with different properties.

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What is the role of temperature in chemical reactions?

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Temperature affects the rate of chemical reactions; generally, higher temperatures increase reaction rates by providing more energy to the reactants.

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What is an independent variable in an experiment?

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An independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

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What is a dependent variable in an experiment?

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A dependent variable is the factor that is measured or observed in an experiment, which is affected by changes in the independent variable.

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What is a controlled variable?

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A controlled variable is a factor that is kept constant throughout an experiment to ensure that the results are valid.

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What is the purpose of a hypothesis in scientific investigations?

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A hypothesis is a testable prediction about the relationship between variables in an experiment.

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How do you measure the rate of a chemical reaction?

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The rate of a chemical reaction can be measured by observing the change in concentration of reactants or products over time.

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What is the significance of using a control group in an experiment?

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A control group is used as a benchmark to compare the results of the experimental group, helping to isolate the effects of the independent variable.

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What is the effect of concentration on reaction rate?

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Increasing the concentration of reactants typically increases the rate of reaction, as there are more particles available to collide and react.

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What is the role of catalysts in chemical reactions?

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Catalysts are substances that increase the rate of a chemical reaction without being consumed in the process.