Understanding Reaction Rates

What happens to the reaction rate when concentration increases?

• The reaction rate decreases.

• The reaction rate remains the same.

• The reaction rate becomes unpredictable.

• The reaction rate increases.

How does a higher concentration of reactants affect the speed of a reaction?

• A higher concentration of reactants increases the speed of a reaction.

• A higher concentration of reactants only affects the temperature of the reaction.

• A higher concentration of reactants decreases the speed of a reaction.

• A higher concentration of reactants has no effect on the speed of a reaction.

Can you name a factor that affects the rate of chemical reactions?

• Type of container used

• Color of the reactants

• Temperature of the environment

• Concentration of reactants

What is the relationship between concentration and reaction rate?

• Higher concentration decreases the reaction rate.

• Higher concentration typically increases the reaction rate.

• Lower concentration increases the reaction rate.

• Concentration has no effect on reaction rate.

If you double the concentration of a reactant, what might happen to the reaction rate?

• The reaction rate will definitely decrease.

• The reaction rate will stop completely.

• The reaction rate may increase, potentially doubling or more, depending on the reaction order.

• The reaction rate will remain unchanged.

Why do reactions occur faster with higher concentrations?

• Reactions are slower at higher concentrations due to dilution effects.

• Increased concentration leads to fewer available reactants for collision.

• Reactions occur faster with higher concentrations due to increased collision frequency between reactant molecules.

• Higher concentrations decrease the energy of reactant molecules.

What is meant by 'reaction rate'?

• The reaction rate is the temperature of a chemical reaction.

• The reaction rate refers to the amount of energy released during a reaction.

• The reaction rate is the volume of gas produced in a reaction.

• The reaction rate is the speed of a chemical reaction, indicating how quickly reactants turn into products.

How can we measure the rate of a chemical reaction?

• By counting the number of molecules present.

• By observing the color change of the reactants.

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

• By measuring the temperature of the reaction mixture.

What role does concentration play in a chemical reaction?

• Concentration only affects the temperature of a chemical reaction.

• Higher concentration decreases the frequency of collisions between reactants.

• Concentration has no effect on the rate of a chemical reaction.

• Concentration increases the rate of a chemical reaction by raising the frequency of collisions between reactants.

What happens to the number of collisions between particles when concentration increases?

• The number of collisions remains the same.

• The number of collisions increases.

• The number of collisions fluctuates randomly.

• The number of collisions decreases.