During the digestion of an organic compound in Kjeldahl's method, a specific chemical is added to raise the boiling point of concentrated H ₂ SO ₄ . Identify this chemical.

Step-by-step solution

In Kjeldahl's method, the organic compound is heated with concentrated H ₂ SO ₄ in the presence of K ₂ SO ₄ and a small amount of CuSO ₄ . The role of K ₂ SO ₄ is to elevate the boiling point of sulfuric acid so that the digestion can take place at a higher temperature. CuSO ₄ acts as a catalyst to speed up the reaction. Answer: K ₂ SO ₄