Polyphosphates are used as water softening ag | vedclass

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(A) Polyphosphates,such as sodium hexametaphosphate $(Na_6P_6O_{18})$,are used to remove $Ca^{2+}$ and $Mg^{2+}$ ions from hard water.They form stable

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They form soluble complexes with cationic species

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(A) Polyphosphates,such as sodium hexametaphosphate $(Na_6P_6O_{18})$,are used to remove $Ca^{2+}$ and $Mg^{2+}$ ions from hard water.They form stable,soluble complexes with these metal cations,effectively sequestering them and preventing them from forming insoluble precipitates (like carbonates or sulfates) that cause hardness.The reaction is represented as:$2Ca^{2+} + Na_2[Na_4(PO_3)_6] \rightarrow Na_2[Ca_2(PO_3)_6] + 4Na^+$Since the resulting complex is soluble in water,the hardness is removed without forming a precipitate.

Polyphosphates are used as water softening agents because:

Similar Questions

Observe the following statements:
$1.$ Heavy water is harmful for the growth of animals.
$2.$ Heavy water reacts with $Al_4C_3$ and forms $\text{deuterated acetylene}$.
$3.$ $BaCl_2 \cdot 2D_2O$ is an example of $\text{interstitial deuterate}$.
The correct statements are:

The following methods can not be used to remove permanent hardness of water:

The boiling point of heavy water is ............ $^o C$?

$A$ water sample contains $30 \, ppm \, MgSO_4$ and $19 \, ppm \, MgCl_2$. Calculate the hardness of water in $ppm$ in terms of $CaCO_3$ equivalent.

Temporary hardness of water can be removed by

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