Is Water Hard or Soft
Standardizing the approximately 0.01M EDTA requires one to pipet 50-mL portions of the Standard (CaCl2) calcium chloride solution to three 250 milliliter volumetric flasks. Afterwards append five droplets of Eriochrome Black T indicator solution, 5-mL of NH3-NH4Cl buffer solution followed by five droplets of magnesium-EDTA convoluted solution. This should then be accompanied by a titration with just about 0.01 molar of the EDTA solution. After doing so, calculate the molarity for EDTA from the data obtained for each titration. Work out the average of these values.
Obtain a sample bottle of approximately 500-mL deionized water and pipet three portions of ...