Question

Which of the following can be a method of preparation of a carbonate?

• A. By passing $C{O}_2$ through an alkali
• B. By reacting basic oxides and $C{O}_2$
• C. By precipitation from heavy metal carbonates
• D. None of these

Answer 1

Answer: (B), (C)

By precipitation from heavy metal carbonates

The metallic carbonates and bicarbonates are prepared:
By passing $C{O}_2$ through an alkali.
$2NaOH+C{O}_2\to N{a}_{2}C{O}_3\downarrow +H_{2}O$
$NaC{O}_3+C{O}_2+H_{2}O\to 2NaHC{O}_3$
Excess(Soluble)
Heavy metal carbonates are precipitated from the salt solutions with washing soda.
$N{a}_{2}C{O}_3+BaC{l}_2\to BaC{O}_3\downarrow +2NaCl$
By reaching basic oxides and $C{O}_2$.
$K_{2}O+C{O}_2\to K_{2}C{O}_3$

$N{a}_{2}O+C{O}_2\to N{a}_{2}C{O}_3$

Hea