Question 3
In this conservation-of-mass experiment, 100 ml of calcium chloride solution is placed in a conical flask and 20 ml of sodium sulfate solution in a test tube inside it. The flask is stoppered. The entire sealed set-up is weighed, then the test tube is tipped to mix the solutions without opening the flask. The entire set-up is weighed again after reaction. Wear safety goggles and gloves.
Why is it important to record the mass of the flask with the reactants before and after the reaction?
Why is it important to record the mass of the flask with the reactants before and after the reaction?
