What is "calgon" ? Give structure and its uses?

Hexamer of meta phosphoric acid exist as sodium salt which is called  sodium metaphophate or sodium polymetaphosphate and it is commercially  known as "CALGON" and use as water softener.

Related Questions:

What are "pyro" oxy acids?

What are "Ortho" or "Meta" oxyacids?

What is Meta Boric Acids?

What are the structural difference between oxides ( P4O6 and P4O10) of phosphorous?

What are common structural features of oxides (P4O6 and P4O5) of phosphorous?

Why bond angle of hydrides of group 15, decreases down the group?

Hydride: NH₃ > PH₃ > AsH₃ >SbH₃

H-M-H angle: 107 > 92 > 90 > 91 (Degree)

This is due to the decrease in electronegativity of the central atom of hydride. As the electronegativity decrease the electrons which were more close to central atom at lower hydrides tends to more far from it and bp-bp repulsion decreases.

Related Questions:

Which is more basic N(CH3)3 or N(SiH3)3 , explain?

Trisilyl amine, N(SiH3)3 is planar whereas trimethyl amines N(CH3)3 is pyramidal. Explain why?.

Are all the five bonds of PCl5 equivalent? Justify your answer.

What are common structural features of oxides (P4O6 and P4O5) of phosphorous?

What are the structural difference between oxides ( P4O6 and P4O10) of phosphorous?

What are abnormal behaviour of Nitrogen atom as compared to other family members?

What is product obtained when N2O5 is treated with NaCl?

What is metaphophoric (HPO3)?

Phosphorus can form PCl5 but nitrogen can not form NCl5 why?

Why PCl3 hydrolysed while NCl3 can not be hydrolysed?