Data Table 2: Complexometric Titration of Tap Waterphoto shows equation to find water hardness 6 ml of water used (5 ml of tap water 1ml of buffer) Hard Water Trial 1Hard Water Trial 2Hard Water Trial 3Initial Syringe Reading (mL)2ml2ml2mlFinal Syringe Reading (mL).61ml.69ml.58mlVolume of EDTA Consumed (mL)139ml131ml142mlWater Hardnessppm CaCO3 (mg/L) Average ppm CaCO3 (mg/L): mL EDTA1 L0.01 mol EDTA1 mol CaCO,mol CaCO,%3D11,000 mL1 L1 mol EDTA1,000 mg100.1 g CaCO,1 mol CaCO,1,000 mLmol CaCO,mL Water Samplemg/L CaCO,%3D1 g1 Lmg/L CaCO,=_ppm CaCO,continued on next

We would use given instructions for calculation to proceed for calculation. For this we would use…

Answered: 6 ml of water used (5 ml of tap water…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter1: The Nature Of Chemistry

Section: Chapter Questions

Problem 120QRT

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Data Table 2: Complexometric Titration of Tap Water

photo shows equation to find water hardness

6 ml of water used (5 ml of tap water 1ml of buffer)

	Hard Water Trial 1	Hard Water Trial 2	Hard Water Trial 3
Initial Syringe Reading (mL)	2ml	2ml	2ml
Final Syringe Reading (mL)	.61ml	.69ml	.58ml
Volume of EDTA Consumed (mL)	139ml	131ml	142ml
Water Hardness ppm CaCO₃(mg/L)

Average ppm CaCO₃ (mg/L):

mL EDTA
1 L
0.01 mol EDTA
1 mol CaCO,
mol CaCO,
%3D
1
1,000 mL
1 L
1 mol EDTA
1,000 mg
100.1 g CaCO,
1 mol CaCO,
1,000 mL
mol CaCO,
mL Water Sample
mg/L CaCO,
%3D
1 g
1 L
mg/L CaCO,=_ppm CaCO,
continued on next

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