Which option is an example of a chemical reaction that occurs at a very slow rate?
Responses
alcohol burning
alcohol burning
iron rusting
iron rusting
an explosion
an explosion
dissolving an antacid tablet
iron rusting
Which statement about chemical reaction rates is true?
Responses
The reaction rates can change.
The reaction rates can change.
The reaction rates are always constant.
The reaction rates are always constant.
The reaction rates cannot increase.
The reaction rates cannot increase.
The reaction rates cannot decrease.
The reaction rates can change.
How can the rate of a reaction be increased?
Responses
decreasing the amount of reactants
decreasing the amount of reactants
having more surface area
having more surface area
diluting a solution
diluting a solution
lowering the temperature
decreasing the amount of reactants
having more surface area
diluting a solution
increasing the temperature
How can the rate of a reaction be increased?
Responses
decreasing the amount of reactants
having more surface area
diluting a solution
lowering the temperature
Apologies for the repetition in the previous response. To answer your question, the rate of a reaction can be increased by:
- Increasing the concentration or amount of reactants
- Increasing the surface area of the reactants (e.g., breaking solids into smaller pieces)
- Increasing the temperature of the reaction
- Using catalysts to lower the activation energy of the reaction
- Increasing the pressure in a gaseous reaction (if applicable)
How can the rate of a reaction be decreased?
Responses
reducing the surface area
reducing the surface area
adding a catalyst
adding a catalyst
increasing the amount of reactants
increasing the amount of reactants
raising the temperature
Reducing the surface area
Adding a catalyst
Increasing the amount of reactants
Raising the temperature
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