answers: Water Purity Test

The boiling point of pure water is 100 degrees celsius. If water contains any impurities this will alter its boiling point. The purest water was probably the distilled water, but tap and mineral water would also have been pure. All of these water samples would have had a boiling point that was very close to 100 degrees celsius.

To make this experiment fairer you really should've carried out each boiling point test 3 times. You could have then taken an average of your boiling points for each water sample. This would have made sure that you did not have an anomalous (wrong) result.

The kind of pollutants you find in water that has come from our homes are detergents (soaps) and sewage. Farms can cause pollution from their use of fertilisers and pesticides. The manure from farm yard animals is also a problem if it gets into our water supplies. Industries have to be very careful not to pollute our water. Industrial companies get fined huge amounts of money if any of their pollutants get into our water system. The common industrial pollutants are acids, alkalis and compounds of poisonous metals.

Click here to read more on water pollution.

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