9 13681.03 Question 4 Requirements • Ice, roughly crushed • Water • 250 ml beaker × 3 • Electronic scales to measure up to 200 g to 0.1 g • Thermometer • Kettle (1 per room) Before the examination Boil the water and pour approx. 70 ml of water into one of the beakers. When the candidate begins the experiment, the water should have cooled to a temp of approx. 70 °C. Place approx 40 g of ice into a second beaker. Leave the remaining beaker, the scales and the thermometer on the desk. Action at changeover Replace the beakers, with ice and water in two and an empty beaker on the desk. Return the scales to zero. Place the thermometer on the desk.