Required Practical 3: investigation on how the rate changes with temperature

Describe the experiment on how rate changed with temperature.

• measure 10cm of 0.2 HCL and 10cm of sodium this surface in separate measuring cylinders and boiling tubes

• Ensure both solutions are at the same temp

• Place conical flask on top of a black cross. Add sodium thiosulfate then HCL

• Start the stopwatch and swirl solution to mix

• Stop the clock when the cross disappears and repeat with different temperatures

• Draw a graph of temperature against time

• 1/T is a measure of rate

What is K (from the Arrhenius equation) proportional too?

Rate of reaction

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