Final answer:
To test water hardness, examine the sample's clarity, test its pH, observe residue on filter paper after filtration, and perform a soap test to see how well it lathers. For precise measurements, a water testing kit or titration can be used.
Step-by-step explanation:
Experimental Test for Hardness of Water
To determine if a water sample is hard or soft, you can perform a series of experimental tests. Firstly, collect a water sample in a clear bottle and observe its clarity by holding it against the light. Next, test the pH of the water using pH strips or a pH meter to determine its acidity or alkalinity. To check for suspended particles, you can pour some of the water through filter paper and then examine any residue left on the filter.
Hard water typically contains high levels of minerals like calcium and magnesium, which can be determined by doing a soap test. In this test, you add soap to the water sample and observe how well it lathers. Hard water will have difficulty forming suds due to the minerals present. Additionally, for a more precise measurement, you can use a water testing kit or conduct a titration using a chelating agent to quantify the level of hardness ions.
Finally, you should write down all of your observations and analyze the results to determine the hardness of the water.