Which method will be employed to test the hardness of water?

1.	Which method will be employed to test the hardness of water?
Answer» <html><body><p> Formation of lather with <a href="https://interviewquestions.tuteehub.com/tag/soap-11667" style="font-weight:bold;" target="_blank" title="Click to know more about SOAP">SOAP</a></p><br/><br/><p>Soap solution is used to measure the <a href="https://interviewquestions.tuteehub.com/tag/hardness-14971" style="font-weight:bold;" target="_blank" title="Click to know more about HARDNESS">HARDNESS</a> of rain water, temporarily hard water and sea-water. Hard water does not form soap lather. This is because magnesium ions or calcium ions <a href="https://interviewquestions.tuteehub.com/tag/present-1163722" style="font-weight:bold;" target="_blank" title="Click to know more about PRESENT">PRESENT</a> in hard water react with soap to form calcium stearate or magnesium stearate and thus <a href="https://interviewquestions.tuteehub.com/tag/forms-11384" style="font-weight:bold;" target="_blank" title="Click to know more about FORMS">FORMS</a> scum.</p></body></html>

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