3e) describe two observations that you would make when concentrated sulphuric acid is added to solid sodium iodide.
One observation could be that, at the beginning, when NaI is in excess with respect to H2
, only HI should form from the reaction, and when the amount of H2
increases, adding it drop by drop, HI then should react again with it forming I2
O, so you should observe a change in colour of the mix, from white to yellow-brown, during the addition of the acid.
I ask for confirm of this.