CHY 142 Final: Hardness of Water Formal Report Sheets
Document Summary
To be attached as an appendix to your formal report. Part a: preparation of calcium carbonate standard: mass of calcium carbonate, total volume of standard solution, molarity of calcium carbonate standard. Part d: determination of water hardness in unknown sample. Note: show all calculations for trial #1 on a separate page in the appendix. Volume of edta used to titrate blank (ml) Volume of edta required to titrate unknown sample (ml) Moles of edta required to titrate 25 ml of unknown sample. Moles of caco3 per 25 ml of unknown sample (moles) Weight of caco3 per 25 ml of unknown sample (g) Weight of caco3 per 106 ml unknown sample (g) ppm of caco3 in unknown. The average caco3 content of unknown # is _____ _____ ppm. Please indicate and comment on sources of error that could or did occur in this completion of this experiment. Please ensure that these sources are reasonable (no solar flares please). (3 marks)
