Write the formula for the following. Sodium hydrogencarbonate. Class 9

Write the formula for the following. Sodium hydrogencarbonate. Class 9

Question 1.

Write the formula for the following: Class 9

(i) Sodium hydrogencarbonate

(ii) Sulfur dioxide

(iii) Ferric chloride

(iv) Cuprous oxide

Answer:

(i) Sodium hydrogencarbonate → NaHCO₃

(ii) Sulfur dioxide → SO₂

(iii) Ferric chloride → FeCl₃

(iv) Cuprous oxide → Cu₂O

Question 2.

Write the formulae for the compounds formed from the following pairs of ions. Class 9

(i) Fe³⁺ and OH^-

(ii) K⁺ and CO₃^2-

Answer:

(i) Fe³⁺ and OH^- → Fe(OH)₃

(ii) K⁺ and CO₃^2- → K₂CO₃