Crossword-Solution: CDSO 4 letters, 1 clue 🏆 scrabble score: 7

Some work was done in trying to establish the ratio between silver and Cadmium by dropping a weighed piece of cadmium into a solution of silver sulphate, the reaction being: Cd + Ag_{2}SO_{4} = CdSO_{4} + 2Ag Silver nitrate cannot be used because it becomes reduced to nitrate even at a temperature of 0°C., as was shown by its reducing action on potassium permanganate, and by the reaction with meta-diamido benzene after the reaction had been completed.