How will you test hard water?
Please answer this question step by step

Solution
Hard water is the water that calcium and magnesium chlorides and sulphates. It does not form froth when soap is dissolved in it.
​​​​​To test whether a water sample is hard or not, the following steps should be done.
1. Take a clean bottle.
2. Pour the water sample into it.
3. Add soap solution into the water.
4. Shake the bottle.
5. If froth not formed, then, we can conclude that the given water sample is hard water.  

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