Multiple choice

The solubility of Na2SO4 ______________ with increase in temperature upto 305K and thereafter _____________.

  1. increases, decreases

  2. decreases, increases

  3. increases, remains constant

  4. remains constant, decreases

  5. none of these

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The initial solubility is due to the hydrated salt. Below 305K, Na2SO4.10H2O crystalises out. Above 305K the anhydrous salt separates out due to its negative temperature co-efficient of solubility.