1.1.1 Fill a burette with 50cm3 of soap solution, add 50cm3 of the first water sample into a flask and use the burette to add 1cm3 of soap solution to the
184.108.40.206 Put a bung in the flask and shake for 10 seconds. Repeat, adding more soap solution until a good lasting lather is formed (bubbles cover surface for at least 30 seconds)
220.127.116.11.1 Record how much soap was needed to create a lasting lather and repeat the process with other water samples.
18.104.22.168.1.1 Next, boil fresh samples of each type of water for 10 minutes and repeat the experiment.
2 When boiling the water for the experiement, water that was unboiled but needed little soap solution and needed the same amount boiled, will
be soft water, water that needed a lot of soap solution before and after will be hard. Water that needed lots of soap and a little soap after
boiled will be temporary