Science

Rate Of Reaction

Experiment 1 - Investigating the effect of temperature on reaction rate

Aim: I want to investigate how temperature effects the reaction rate

Equipment:

A conical flack
Beaker
Measuring Cylinder
Stopwatch
Black cross on paper
Water Bath
Thermometer 
0.1mol/L Sodium Thiosulfate
2.0mol/L Hydrochloric Acid


Method:

1. Put the 'x' paper on the bench mat and put the conical flask on top of the paper
2. Measure 50ml of of Sodium thiosulfate and put it into the beaker
3. Record the temperature of the Sodium thiosulfate
4. Measure 5ml of hydrochloric acid and pour this into the conical flask
5. Pour the sodium thiosulfate into the conical flask, start the stopwatch and swirl the flask. Time how long it takes for the cross disappear when viewed from above
6. Wash out the flask thoroughly
7. Repeat the experiment, using a water bath to heat the sodium thiosulfate to 30 degrees, then 40 degrees and then finally 50 degrees. Keep the volume of acid the same