Question

Write the balanced chemical equation for the following reaction A mixture of k2cr207 and Nacl is heated with concentrated H2So4.

Answer 1

Answer and Explanation:

K₂Cr₂O₇ (Potassium dichromate) when mixed with NaCl (Sodium chloride) and concentrated H₂SO₄ (Sulphuric acid) produces

Cr₂(SO₄)₃ (Chromium sulphate), Cl₂ (chlorine gas), Na₂SO₄ (Sodium sulphate), K₂SO₄ (Potassium sulphate) and H₂O (water)

Hence,

Reactants are :

1. K₂Cr₂O₇
2. NaCl
3. H₂SO₄

Products are :

1. Cr₂(SO₄)₃
2. Cl₂
3. Na₂SO₄
4. K₂SO₄
5. H₂O

Therefore, the balanced chemical equation is

K₂Cr₂O₇ + 6NaCl + 7H₂SO₄ $\rightarrow$ Cr₂(SO₄)₃ + 3Cl₂ + 3Na₂SO₄ + K₂SO₄ + 7H₂O