Question

5. (a) Name two chemicals which are responsible
for temporary hardness of water.
(b) Name four chemicals which are responsible
for permanent hardness of water.​

Answer 1

Answer:

a}Temporary hardness is due to the presence of calcium hydrogencarbonate Ca(HCO3)2(aq) and magnesium hydrogencarbonate Mg(HCO3)2(aq). Both calcium hydrogencarbonate and magnesium hydrogencarbonate decompose when heated. The original insoluble carbonate is reformed. This happens when water is boiled.

b}Salts of Calcium and Magnesium are responsible for hardness of water. Bicarbonates, Carbonates, Chlorides and Sulphates of Calcium and Magnesium causes permanent hardness. These are the salts that cause permanent hardness of water

Answer 2

$\huge\boxed{Answer:}$

Two Chemical which are responsible for temporary hardness are:-

• ${ca}^{2 + }$
• ${mg}^{2 + }$

Four chemicals responsible for permanent hardness are:-

• CaCl2
• MgCl2
• CaCO3
• MgCO3

$<marquee scrolldelay="85"="6"> Thank-you☺</marquee>$