Final answer:
If the weighing balance incorrectly gave a higher mass reading than the actual mass of the zinc chloride salt, the calculated mass of chloride will be higher than the actual mass.
Step-by-step explanation:
The effect on the mass of chloride calculated will depend on whether the weighing balance incorrectly gave a higher mass reading for the zinc chloride salt. If the balance gave a higher reading, the calculated mass of chloride will be higher than the actual mass. This is because the incorrect reading includes additional mass that is not actually present in the salt.