Q- Hydrated barium nitrate, Ba(NO3)2.4H2O, is strongly heated in a boiling tube and the following changes occur.
Stage 1: The white solid forms a clear colourless solution.
Stage 2: Condensation forms around the mouth of the boiling tube and a white solid starts to form at the bottom of the tube.
Stage 3: As the heating continues, the colourless solution disappears leaving another white solid.
Stage 4: This white solid melts.
Stage 5: Nitrogen dioxide and oxygen gases are given off, and barium oxide is left in the test tube.
(a) Give the formula for the white solid formed in Stage 3.
Ans- Barium nitrate
The Attempt at a Solution
I dont understand the experimental procedure here. Can someone please outline what is happening in each stage and what solid is forming in Stage 2 and what condenses and how the thermal decomposition takes place? Shouldnt Barium oxide be formed at Stage 3?