Finding reaction rates from graphs

What does the gradient of a reaction rate graph represent?

The rate of the reaction.

How do you find the initial rate from a graph?

Draw a tangent at t=0t=0 and calculate its gradient.

What happens to the gradient as the reaction progresses?

It becomes less steep as the reaction slows down.

How do you calculate the average rate of reaction?

Divide the total change in reactant/product by the total time.

What does a horizontal line on a rate graph indicate?

The reaction has stopped.

Why does the reaction rate decrease over time?

Reactants are used up, leading to fewer collisions.

How can you determine the total amount of product formed from a graph?

Look at the y-value where the graph plateaus.

How is the rate of reaction affected by a steeper curve?

A steeper curve indicates a faster reaction.

What is the purpose of plotting multiple graphs for different concentrations?

To compare how concentration affects the rate of reaction.

How do you calculate the rate from a curved section of the graph?

Draw a tangent to the curve at the desired point and calculate its gradient.

What units might the y-axis represent in a rate graph?

Volume (cm³), mass (g), or moles (mol).

How does temperature affect the shape of a reaction rate graph?

Higher temperatures result in steeper initial slopes (faster reactions).

Why is it important to measure the reaction rate at regular intervals?

To accurately plot the curve of the reaction.

What does the area under a reaction rate graph represent?

The total amount of product formed or reactant used.

What is the significance of the y-intercept in some reaction graphs?

It may represent an initial condition, such as starting mass or volume.