The temperature is measured. The magnesium is added to the calorimeter, and a reaction takes place. The temperature is measured once reaction ceases. Go to Top Hazards Magnesium burns in a very exothermic reaction. Never look directly at burning magnesium.
Cuts when polishing the magnesium metal are possible.
The dilute acid is corrosive. Keep magnesium away from ignition sources such as open flames. Wear gloves when polishing the magnesium metal ribbon. Fold a 10-cm length of magnesium ribbon, place in the solution, and note evidence for reaction. Obtain the mass of a 1.00 meter length of polished magnesium ribbon from your instructor.