The student filters and dries the precipitate of CaCO, (molar mass 100.1g/mol) and records the data in the table
below.
Volume of Nag CO, solution
Volume of 1.0 M Ca(NO₂), added
Mass of CaCO3 precipitate collected
(c) Determine the number of moles of Na₂CO, in the original 50.0mL of solution.
50.0 mL
100,0 mL
0.93 g
(d) The student realizes that the precipitate was not completely dried and claims that as a result, the calculated
Na₂CO, molarity is too low. Do you agree with the student's claim? Justify your answer.
(e) After the precipitate forms and is filtered, the liquid that passed through the filter is tested to see if it can conduct
electricity. What would be observed? Justify your answer.