Addition of 1 M HBr to 0.1 M solutions of which
compound results in evolution of a colorless gas?
(A) NaHSO3 (B) NaHSO4
(C) Ce(NH4)2(NO3)6 (D) KBrO3

Addition of 1 M HBr to 0.1 M solutions of the compound (A) NaHSO3 results in evolution of a colorless gas.

to make a supersaturated solution, make a saturated solution of sugar by adding 360 grams of sugar to 100 ml of water at 80 degrees celsius. when the water cools back down to 25 degrees, that 360 grams of sugar will still be dissolved even though the water should only dissolve 210 grams of sugar.