In another experiment, a student investigated the temperature increase when different masses of anhydrous calcium chloride were dissolved in 50 cm3 of water.
The apparatus used is shown in Figure 1.
The student used the following method:
Step 1: Measure 50 cm3 of water into the polystyrene cup. Step 2: Record the starting temperature of the water. Step 3: Add 2.0 g of anhydrous calcium chloride and stir the mixture. Step 4: Record the maximum temperature reached. Step 5: Repeat the experiment using different masses of anhydrous calcium chloride.
Name a piece of apparatus that should be used to measure the 50 cm3 of water in Step 1.
