Rate of Chemical Reactions

These flashcards cover key concepts related to the rate of chemical reactions, including factors affecting reaction rate and methods for monitoring these rates.

What happens to the rate of a reaction when the concentration of a reactant increases?

The rate of the reaction will increase due to more collisions among reactant particles.

How does particle size affect the rate of a reaction?

Decreasing the particle size increases the surface area, allowing more collisions and thus speeding up the reaction.

What is used to monitor the rate of a chemical reaction?

The rate can be monitored by measuring how fast reactants are used up and products are formed, often through gas production.

What is an example of a gas produced in a reaction to monitor the rate?

Hydrogen gas produced when dilute hydrochloric acid reacts with zinc metal.

What is a common method to collect gas produced in a reaction?

Gas can be collected over water or in a gas syringe.

What information needs to be recorded to create rate graphs?

The volume of gas produced and the time taken for the reaction.

What is the relationship between concentration and collision frequency?

Higher concentration leads to more frequent collisions, increasing the reaction rate.

What is the effect of increasing particle size on the reaction rate?

Increasing particle size results in fewer surface areas for collisions, thus slowing the reaction.

When collecting hydrogen gas, what apparatus can be used to measure gas volume?

A gas syringe or measuring cylinder can be used.

What are the two different methods mentioned for measuring gas produced?

Collecting over water or using a gas syringe.

How does monitoring the production of gas relate to reaction rates?

It provides a measurable output to assess how quickly a reaction occurs.

Why is the size of reactant particles important?

Smaller particles have more surface area for collisions, increasing the reaction speed.

What does the rate of a chemical reaction indicate?

It indicates how quickly reactants are converted into products.

What specific reaction is mentioned as an example of measuring gas volume?

The reaction between zinc metal and dilute hydrochloric acid.

How is the volume of gas produced helpful in experiments?

It allows scientists to quantify and graph the reaction rate accurately.