Question
Hard water does not give lather with soap due to the
presence of which ions?Solution
Hard water contains dissolved calcium (Ca²⁺) and magnesium (Mg²⁺) ions, which react with soap molecules (sodium or potassium salts of fatty acids) to form insoluble scum instead of forming lather. This makes it difficult for soap to work effectively.
If another new department ‘R&D’ was formed and 40% of the employees from IT and Marketing departments each were moved to the new department, then fi...
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11, 13, 30, 96, 392, ?
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