Sally And James Experiment

Sally and James Experiment Sally and James’ teacher asked them to design and carry out an experiment to investigate the effect that adding salt has on the boiling temperature of pure water. They decided to use the apparatus in the diagram and the procedure they followed was as follows. Experiment 1 In the first experiment they placed 3 heaped spatulas of salt into a beaker which Sally had filled about two thirds full from a cold-water tap in the lab. They then stirred the water until the salt had dissolved. Next Sally collected the apparatus so that James could assemble their equipment. Sally then lit the Bunsen and they timed the temperature increase every 30 seconds. Experiment 2 For the second experiment Sally and James carried out the investigation in much the same way because James had reminded Sally that this would make sure their experiment was a fair test. Experiment 3 Unfortunately, as Sally and James began to carry out the final experiment, they realised that they were running out of time. They decided to increase the gas flow as they were sure this would heat the water up much quicker, enabling them to get their third set of results – they believed that you must have exactly three sets of results before an average can be calculated.