p-Block elementsMedium
Question
The reagent(s) used for softening the temporary hardness of water is(are)
Options
A.Ca3(PO4)2
B.Ca(OH)22
C.Na2CO3
D.NaOCl
Solution
Ca(HCO3)2 + Ca(OH)2 → 2CaCO3 ↓ + 2H2O
[Clarke′s method]
NaOCl + H2O ⇋ HOCl + NaOH
OH- + HCO3- → CO22- + H2O
Ca(HCO3)2 + Na2CO3 → CaCO3 ↓ +2NaHCO3
[Clarke′s method]
NaOCl + H2O ⇋ HOCl + NaOH
OH- + HCO3- → CO22- + H2O
Ca(HCO3)2 + Na2CO3 → CaCO3 ↓ +2NaHCO3
Create a free account to view solution
View Solution FreeMore p-Block elements Questions
A complex cross-linked polymer (silicone) is formed by...On passing CO2 into aqueous solution containing Al3+ :...When chlorine reacts with cold and dilute solution of sodium hydroxide, the products obtained are...Cold solution of barium nitrite on mixing with sulphuric acid produces :...The hydroxide of which metal ion is soluble in excess of sodium hydroxide solution :...