Pyramids were built in Ancient Egypt as tombs, or burial places, for Egyptian pharaohs, or kings. They believed that the pyramids made you immortal. The Ancient Egyptians believed in an afterlife, so it was very important to them to protect the bodies of their pharaohs.
CaCO3, or calcium carbonate, has a molar mass of 100.09 grams per mole. This means there are roughly 566 grams of CaCO3.
1 Determine how many mL of the CaCO3 solution in problem 2 should be titrated with the Na2EDTA solution to require 40.0 mL of titrant. 2  Find the titer value of an EDTA solution in mg CaCO3/mL if 50.00 mL of the CaCO3 standard with 0.800 mg CaCO3/mL requires 45.00 mL of the EDTA titrant to reach a Calmagite endpoint. Transfer 50.00 mL of the sample of a 250 mL Erlenmeyer and titrate in the same manner as in the standardization. 2  Remember to add 5 mL of buffer! 3  Repeat the titration two more times. 4  Calculate the total hardness of the water as ppm CaCO3.