1.

Synthetic detergents are more effective in hard water than soaps because

Answer»

they are non-ionic
their `Ca^(++ )`and `Mg^(++)`salts are insoluble in water
their `Ca^(++)` and `Mg^(++)` salts are water soluble
they are highly soluble in water

Solution :Structural features of soaps and DETERGENTS are almost same except that the POLAR end in detergents is `-OSO_3^(-)NA^+`while in soaps polar end is `-COO^(-)Na^+` Detergents have an advantage over soaps that its polar end sulphate and sulphonate retain their efficiency in HARD water, since the corresponding Ca and Mg salts are soluble. Being salts of STRONG acids, they yield neutral solution, in contrast, to the soaps, which being snits of weak acids yield slightly alkaline solutions.


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