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Determination of the hardness of water lab report

27/03/2021 Client: saad24vbs Deadline: 2 Day

8oz x 8 oz =64 oz x 29.57mL= 1892mL=1.9Lx333.2mg/L=632.7mg

2. Approximately how much calcium would you ingest by drinking eight 8-oz glasses of your local water? Hint: 1 oz (f luid ounce) = 29.57 mL.

Copyright 2019 - Hands-On Labs | http://holscience.com 2 / 4

Data Table 1: EDTA Titration Volume

8oz x 8 oz =64 oz x 29.57mL= 1892mL=1.9Lx333.2mg/L=632.7mg

3. 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.

Copyright 2019 - Hands-On Labs | http://holscience.com 3 / 4

Data Table 2: Water Hardness

Trial Initial EDTA Volume (mL)

1

2

3

Trial Final EDTA Volume (mL)

1

2

3

Average Volume of EDTA Used (mL)

Trial Total Volume EDTA Used (mL)

1

2

3

10

11

13

7.5

6.5

10

2.5

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