AS practical 4 The effect of temperature on rate

AS Practical 4 The effect of temperature on rate :                     HazCard :

Each student

• Plastic container with lid (2 holes in lid for specimen tubes and one hole for thermometer seee link cleapss) Use conical flask to mix up the 2 chemical and put it on the cross waiting for it to disappear (as Effect of concentration on reaction rate2)

• 10 cc measuring cylinder

• 1 cc plastic syringe

• stop-clock

• 2 specimen tubes (to fit holes in box lid)

• Thermometer

For the class

• Some kettle

• Large beakers (for getting water to suitable temperature)

• marker pens

• 2.0 M HCl (10 cc per student)

• 0.050 M Sodium thiosulfate solution (50 cc per student)

• Large beaker containing sodium carbonate solution with phenolphthalein (labelled "Stop-Bath") if this go purple, then more sodium carbonate is required