If water contains dissolved calcium hydrogencarbonate, out of soaps and synthetic detergents which one will you use for cleaning clothes ?

Explanation

To determine whether to use soap or synthetic detergents for cleaning clothes in water containing dissolved calcium hydrogencarbonate, follow these steps:

### Step 1: Understand the Composition of Hard Water
- Hard water contains dissolved minerals, primarily calcium (Ca²⁺) and magnesium (Mg²⁺) ions. Calcium hydrogencarbonate is one of the compounds that contribute to water hardness.

### Step 2: Analyze the Behavior of Soap in Hard Water
- Soap is a sodium salt of fatty acids. When soap is added to hard water, it reacts with the calcium and magnesium ions to form insoluble salts (precipitates). This reaction reduces the effectiveness of soap, as it cannot clean properly when it forms these precipitates.

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