Experiment #11 Determination of Water Hardness
Autor: Lizzie Stassenko • January 27, 2016 • Lab Report • 622 Words (3 Pages) • 2,371 Views
Experiment #11 Determination of Water Hardness
Elizabeth Stassenko
1/21/16
Purpose:
- ● To become familiar with the concept of water hardness
- ● To practice a titration technique using a titrator
- ● To determine the hardness of the local water supply
[pic 1]
[pic 2]
[pic 3]
[pic 4]
[pic 5]
[pic 6]
[pic 7]
[pic 8]
Data and Observations:
[pic 9]
Questions
A. Based on the analysis of your local water, would you classify its hardness as soft, moderate, hard, or very hard? Explain your answer.
I would describe my local water as soft because 3 ppm falls within the soft classification (0-60 ppm).
B. Approximately how much calcium would you ingest by drinking eight 8-oz glasses of your local water? Hint: 1oz (fluid ounce) = 29.57 mL.
I would ingest approximately 25.03 mg of calcium by drinking eight 8 oz glasses of my local water.
C. Assume an average minimum daily requirement for calcium is 1,150 mg. Calculate what percentage of your daily requirements could be met by drinking 1.0 L of your local water.
...