Question

Why soap is not suitable for washing cloth in hard water​

Answer 1

Although soap is a good cleaning agent, its cleaning capacity is reduced when used in hard water. ... The insoluble scum sticks on the clothes and so the cleaning capacity of soap is reduced. The cleaning action of soap is very effective in soft water because it contains negligible calcium and magnesium ions.

Answer 2

hello mte ur

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hard water containing calcium and magnesium ions soap is basically sodium or potassium salt of higher fatty acid when soap is added to hard water corresponding calcium and magnesium salt are formed which being insoluble get precipitated this precipitated is called scum and that's y soap is noy suitable for hard water