AQA Trilogy Chemistry P2 Rate & extent of chem change basics

What is the rate of a chemical reaction in terms of reactants?

• Get bigger
• Reactants disappear
• How quickly products are formed
• How quickly reactants are used up
• How quickly products are used up

What is the rate of a chemical reaction in terms of products?

• Get bigger
• Products disappear
• How quickly reactants are formed
• How quickly reactants are used up
• How quickly products are formed

What is the formula for a mean rate of reaction in terms of reactants?

• Time per unit value of reactivity
• Time taken for reaction to finish
• quantity of reactant used/time taken
• quantity of product used/time taken

What is the formula for a mean rate of reaction in terms of products?

• Time per unit value of reactivity
• Quantity of product formed/time taken
• Time taken for product to form
• quantity of product used/time taken

How can you measure the quantity of a reactant or product?

• Weighing it or collecting gas
• Guessing
• Observing
• Temperature change

What are the two possible units for rate of reaction?

• g/min and min/cm3
• g/hour and g/cm3
• g/hour and min/cm3
• cm3/min and min/hour
• g/s and cm³/s

How could you measure the rate of a reaction from a graph?

• Darw a tangent
• Calculate the gradient
• Draw a tangent to the curve and calculate the gradient.
• Take a mean value

What is "collision theory"?

• Stuff banging into each other
• Reactionsonly happen when they collide
• Most particles bounce off each other
• Reactions only occur when particles collide with sufficient energy

What factors can affect the rate of a reaction?

• Temp, surface area, concentration, gas pressure, catalyst
• Colour, surface area, temp, gas pressure
• Concentration, surface area, time, colour
• Temp, gas pressure, surface area, luck
• Catalyst, temp

State the effect of increasing the surface area on the rate of a reaction

• Increases the volume
• Increases the time
• Decreases the rate
• Increases the rate