RP3: Investigating how rate changes with temperature
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10 Terms
Overview of the method used in the experiment (7)
What equipment is used to measure 10.0 cm³ of sodium thiosulfate solution? (1)
A measuring cylinder
What is placed under the conical flask in this experiment? (1)
A white tile with a cross drawn on it
What should be recorded before starting the reaction? (1)
The initial temperature
What is added to the sodium thiosulfate solution to start the reaction? (1)
1 cm³ of 1 mol dm⁻³ hydrochloric acid
What should be recorded as the reaction takes place? (1)
The time for the cross to disappear from view
What measurement is taken after the reaction is complete? (1)
The final temperature of the reaction mixture
How many different temperature conditions should be used in this experiment? (1)
At least 5 different temperatures
What should be plotted on a graph to analyse the results? (1)
A graph of temperature vs. time, using the average temperature for each reaction
Why can the temperature of an exothermic reaction only be approximated? (1)
Because you can only take a reading of the initial temperature