s-Block ElementsHard
Question
Chemical (A) is used for water softening to remove temporary hardness. A reacts with Na2 CO3 to generate caustic soda. When CO2 is bubled through (A), it turns cloudy (i.e. milky). What is the chemical formula of (A) ?
Options
A.CaCO3
B.CaO
C.Ca(OH)2
D.Ca(HCO3)2
Solution
The temporary hardness of water is due to the presence of bicarbonates of Ca2+ and Mg2+.
Ca(HCO3)2 + Ca(OH)2 (A) → 2CaCO3 ↓ (mikiness) + H2O.
Ca(OH)2 + Na2CO3 → CaCO3 ↓ (white) + NaOH.
Ca(OH)2 + CO2 → CaCO3 ↓ (mikiness) + H2O.
Ca(HCO3)2 + Ca(OH)2 (A) → 2CaCO3 ↓ (mikiness) + H2O.
Ca(OH)2 + Na2CO3 → CaCO3 ↓ (white) + NaOH.
Ca(OH)2 + CO2 → CaCO3 ↓ (mikiness) + H2O.
Create a free account to view solution
View Solution FreeMore s-Block Elements Questions
Select the correct statement(s) with respect to sodium hydroxide....What is the formula of basic anhydride of Ba(OH)2 ?...Based on lattice energy and other considerations which one of the following alkali metal chlorides is expected to have t...In view of their ionisation energies, the alkali metals are :...Slaked lime, Ca(OH)2 is used :...