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What is a reaction rate?
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The reaction rate is the speed at which a chemical reaction occurs, indicating how fast reactants are converted into products.
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How does temperature affect reaction rate?
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Increasing temperature generally increases reaction rates because it causes particles to move faster, leading to more frequent and energetic collisions.
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What is the effect of concentration on reaction rate?
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Increasing the concentration of reactants usually increases the reaction rate by raising the frequency of collisions.
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How does surface area affect the rate of reaction?
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Increasing the surface area of a reactant increases the reaction rate by providing more area for collisions to occur.
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What role does a catalyst play in reaction rates?
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A catalyst increases reaction rates by lowering the activation energy needed for the reaction to proceed.
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What is activation energy in the context of reaction rates?
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Activation energy is the minimum energy required for a chemical reaction to occur when reactants collide.
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How does the presence of inhibitors affect reaction rates?
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Inhibitors slow down reaction rates by increasing the activation energy or interfering with the reactants.
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What is the collision theory?
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Collision theory states that chemical reactions occur when particles collide with sufficient energy and proper orientation.
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What does the term 'rate law' mean?
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Rate law is an equation that links the reaction rate with the concentrations of reactants, showing how changes in concentration affect the rate.
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How does pressure affect the rate of reaction in gases?
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Increasing pressure increases reaction rates of gaseous reactions by concentrating reactant molecules, leading to more frequent collisions.
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What is a reaction mechanism?
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A reaction mechanism is a sequence of elementary steps that describe the specific process by which reactants become products.
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Do all reactions proceed at the same rate? Why or why not?
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No, reaction rates vary due to factors like reactant nature, concentration, temperature, catalysts, and the presence of inhibitors.
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Can reaction rates be both fast and slow? Give examples.
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Yes, reaction rates can vary greatly. For example, combustion is fast, whereas rust formation is slow.
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What is the difference between a homogeneous and heterogeneous catalyst?
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A homogeneous catalyst is in the same phase as the reactants, while a heterogeneous catalyst is in a different phase.
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What does 'reaction order' refer to?
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Reaction order is the power to which the concentration of a reactant is raised in the rate law.
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