Lab: Determination of Water Hardness by TitrationWater hardness is a measure of the amount calcium...

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Lab: Determination of Water Hardness by TitrationWater hardness is a measure of the amount calcium ion present in a water sample. Well water often has high concentrations of calcium as a result of the water dissolving calcium containing minerals from rocks in contact with the water. In this lab, you will perform several titrations on hard water, tap water and “soft” water samples. It will illustrate the concepts of stoichiometry, molar mass, solution calculations and titration.

View theDetermination of Water Hardness by Titration power point attached below, and watch the video to see what to expect as you perform the titrations in this lab.This will provide you with the necessary foundation for successfully completing the lab.Video on Titration Procedure:https://www.youtube.com/watch?v=bGh6Y02YFCw

Note:While you work on the lab,you are required to take certain images/photos of your labto document that you actually completed the lab yourself. Each photo should include anote card or a piece of paper with your name, the date you completed the experiment and your course section numberclearly visible.

Note Card Information:

My Name: Zack Aldawoody

Section Number: 145454

Download the item:Determination of Water Hardness LabReport attached below. This is what you will submit for grading. You can type your results and insert your images into this document.

Neelakshi · Accepted Answer

Determination of Water Hardness 
by Titration Lab Report 
Activity 1: Complexometric Titration 
(1 point) Calculation Examples 
On a clean sheet of paper, clearly show the following four calculations using your 
data for Hard Water Trial 1. Write your name, the correct date and the section 
number on the paper. Take a photo of your calculations and insert it in the box 
below. (Calculations 2 and 4 are found on Page 6, Equation 6 of the Investigation 
Manual.) 
1. Volume of EDTA Consumed (mL) Calculation 
2. Moles of CaCO3 Calculation 
3. Molarity (M = 
??? ????3
? ?? ????? ??????
) of CaCO3 Calculation 
4. Water Hardness ppm CaCO3 (mg/L) Calculation
Repeat the calculations for all remaining Hard Water, Tap Water and Soft Water 
Trials, but you do not need to include images of this work. 
Data Tables  
(1 point) Complete the information below based on Data Table 1: Complexometric 
Titration of Hard Water in the Investigation Manual with the measured and 
calculated values for each Hard Water Trial. 
Hard Water Sample 
Hard Water 
Trial 1 
Hard Water 
Trial 2 
Hard Water 
Trial 3 
Initial EDTA Syringe 
Reading (mL) 
20 20 20 
Final EDTA Syringe 
Reading (mL) 
4.3 4.2 4.4 
Volume of EDTA Consumed 
(mL) 
(initial – final reading) 
15.7 15.8 15.6 
Moles of CaCO3 in Sample 3.7 x 102 3.6 x 102 3.8 x 102 
Molarity of CaCO3 in Sample 
(M = mol/L) 
1 x 10-2 1.003 x 10-2 1.

Lab: Determination of Water Hardness by TitrationWater hardness is a measure of the amount calcium ion present in a water sample. Well water often has high concentrations of calcium as a result of the...

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