chemistry rates of reactions

Rates of reaction can be increased by…?

• Increasing the temperature

• Increasing the concentration of the reactant

• Increasing the surface area

• Through the use of catalyst

how do you measure the reactions rate?

• change in mass

• Change in volume

• Change in other quantities

Different ways to interpret graphs?

• end point of reaction

• Quantity of product

• Quantity of reactant used

• Effect of changing conditions

How do you calculate the rate of reaction?

Rate = 🔺quantity

____________

🔺time

• use the appropriate unit cm3s-1 (cm3/s)

• Be able to show that rates of reaction decreases over time by calculating the average rate at different stages of reaction.

What are examples of catalysts?

Best = manganese dioxide

Okay = copper oxide

Slow = apple (catalase)

What is a catalyst?

A catalyst is a substance that speeds up a chemical reaction, but it itself remains chemically unchanged.