Chemistry Paper 2 Required Practicals

Rates RP- Which of these is NOT a way of completing a rate of reaction experiment?

• Observe how quickly a precipitate forms

• Measure a change in mass over time

• Measure the volume of gas produced over time

• Measure the temperature increase

Rates RP- How do you calculate the rate of reaction?

• Amount of product formed / Time

• Time / Amount of product formed

• Amount of product formed x Time

• 1 / (Amount of product formed x time)

Rates RP- What chemical is forming that makes the disappearing cross cloudy?

• Carbon

• Sulfur

• Hydrochloric acid

• Sodium chloride

Rates RP- What piece of equipment is needed for EVERY rates practical?

• Gas syringe

• Delivery Tube

• Stopwatch

• Balance

Rates RP- Which of these is a CONTROL VARIABLE in the disappearing cross reaction when the concentration of the hydrochloric acid is changed?

• Time taken for the cross to disappear

• Concentration of the hydrochloric acid

• Volume of the hydrochloric acid

• Stopwatch used

Rates RP- How do you measure the average rate of reaction using a graph?

• Average gas produced / time taken

• Draw a tangent and find its gradient

• Find where it crosses the y-axis

• Measure the area under the graph

Rates RP- How do you measure the rate of reaction at a specific time using a graph?

• Average gas produced / time taken

• Draw a tangent and find its gradient

• Find where it crosses the y-axis

• Measure the area under the graph

Rates RP- Which of these is NOT a piece of equipment that could be used to measure the volume of gas produced in a chemical reaction?

• Conical flask

• Gas syringe

• Measuring cylinder

• Burette

Rates RP- Which of these is NOT a factor that affects the rate of a reaction?

• Concentration

• Temperature

• Surface area

• Volume

Rates RP- What are the units of rate of reaction if you are measuring a change in mass?

• cm3/s

• dm3/s

• mol/s

• g/s