We use polymetaphosphates as water softeners | vedclass

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Question

(C) Polymetaphosphates,such as sodium hexametaphosphate $(Na_6P_6O_{18})$,are commonly used as water softeners. They function by sequestering the meta

Vedclass · Accepted Answer

Form soluble complexes with the cations of hard water

Vedclass · Answer

(C) Polymetaphosphates,such as sodium hexametaphosphate $(Na_6P_6O_{18})$,are commonly used as water softeners. They function by sequestering the metal cations responsible for water hardness,such as $Ca^{2+}$ and $Mg^{2+}$. These polyphosphates form stable,soluble complexes with these cations,thereby preventing them from reacting with soap to form scum. Therefore,the correct mechanism is the formation of soluble complexes with the cations of hard water.

We use polymetaphosphates as water softeners as they:

Similar Questions

Lime or $CaCl_2$ is added to water to remove which of the following impurities?

Which pairs of ions are responsible for hardness of water?

Some statements about heavy water are given below:
$(i)$ Heavy water is used as a moderator in nuclear reactors.
$(ii)$ Heavy water is more associated than ordinary water.
$(iii)$ Heavy water is more effective solvent than ordinary water.
Which of the above statements are correct?

Calgon is

Assertion $(A)$ : $NaCl$ is less soluble in heavy water than in ordinary water.
Reason $(R)$ : Dielectric constant of ordinary water is more than that of heavy water.
The correct answer is

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