What is a test for water purity?Question from my Year 11 chemistry textbook: 8b) Describe a test to show that a sample of water is pure.
There are numerous tests for water purity. One is a pH test. This measures the acidity level of the water. Simply dip a pH test strip into the water and check the colors seen against the color scale on the pH paper packaging. It should read between 5.5 and 8.5. You can do a TDS test to measure the total dissolved solids. Simply dip a TDS meter into the water to get a reading. Readings should be below 500 mg/liter. One final test is for total coliform bacteria, or harmful bacteria that can cause illness. This should be performed by a professional tester. Any local health department can test a sample of water for dangerous coliform bacteria.