A 1.248 g sample of limestone rock is pulverized and then treated with 30.00 mL of 1.035 M HCl solution. The excess acid then requires 11.56 mL of 1.010 M NaOH for neutralization.
Calculate the percent by mass of calcium carbonate in the rock, assuming that it is the only substance reacting with the HCl solution.
Please explain the analysis.© BrainMass Inc. brainmass.com March 5, 2021, 12:25 am ad1c9bdddf
Mol of HCl initially = 0.030L x 1.035M = 0.03105 mol HCl
Mol of NaOH reacted = Mol of HCl excess = 0.01156L x 1.010M = ...
This solution helps calculate percent by mass.