Final answer:
Not all the solid borax will dissolve in the saturated solution being prepared, so the entire mass added is not required for the experiment. Accurately weighing a chemical is crucial in most cases to ensure correct stoichiometry and concentration in solutions. The option (C) is correct.
Step-by-step explanation:
In chemistry experiments, determining the mass of a chemical is crucial for calculating stoichiometry and for preparing specific concentrations of solutions. To find the mass of a chemical, you would typically use a balance to weigh a container like a watch glass, add the chemical to the container, and then calculate the mass of the chemical by subtracting the mass of the empty container from the total mass. However, in the specific scenario described in the question, where a saturated borax solution is being prepared, the precise mass of borax may not be required, because not all of the solid will dissolve in the solution. not all the solid borax will dissolve in the saturated solution we will prepare, so knowing the total mass added may not be necessary for the experiment.
When preparing solutions with a specified concentration, it's important to weigh the appropriate amount of solute and dissolve it in a solvent to reach the final desired volume. This process is essential for ensuring accurate experimental results and is a fundamental task in chemistry labs. Therefore, option (C) is correct.