Name Group Results:· Total...

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Name                                Group                                       Results:· Total Dissolved Solids in Water Samples (15 pts)    Sample #    Brand of Sample    Relative amount of Solids/Comments    1    Distilled Wate        2            3        Preparation of EDTA solution (10 pts)Grams of EDTA required                                Mass of EDTA(Analytical Balance)    Mass of 250 mL flask(Top Loading Balance)    Tare mass            Gross mass            Net mass        moles of EDTA             mass of water             Concentration of EDTA (use coect units and number of significant figures!) (15 Pts)Molarity (M)                    Insert your group’s data sheet here. (10 pts) · Quantitative Determination of Calcium Ion in Water Samples by EDTA Titration (30 pts)        Dist. Wate    Sample 1    Sample 2    Trial numbe    1    2    3    4    5    Brand Name    N/A                    Sample Volume XXXXXXXXXXor 10.00 mL)                         Initial Volume (Vo)                         Final Volume (Vf)                         Net Volume                        mol EDTA                        molarity Ca2+                        Water Hardness                     Questions (total of 20 pts)· Do the qualitative and quantitative results coelate? Explain your answer. (10 pts)· Why is hard water undesirable for some household and industrial uses? Explain the problem(s) encountered with using very hard water in these applications using chemical equations. This may require a little research. (10 pts) Sample # | Brand of Sample Relative amount of Solids/Comments1 | Distiled Water No residue Left ) NO chonge cftet |Rlyine White vesidue Left in the shape ofa dplot3 | Pguadna NO residue LfE , No change sbler] Grams of EDTA required _o-dbig  ‘Mass of EDTA Mass of 250 mL flask(Analytical Balance) (Top Loading Balance)Gabaacy XXXXXXXXXXAMS: 134 9A Dist. Water Sample 1 eh ca Sample 2 [a Ca)Brand Name Na |BlsereS Folloginm Aguafinasample votume | 5 oo | some 25 ceml | 95.00mLnia Volume (V9) | 0. Gone omvome 2:00 vl | 13.20acFiaal Vome (V) | gm | 383ml |R:55me | 13@ 30rd] 3g.62me

Baljit · Accepted Answer

Name								
Group  			
						
 
Results:
· Total Dissolved Solids in Water Samples (15 pts)
	Sample #
	Brand of Sample
	Relative amount of Solids/Comments
	1
	Distilled Water
	No residue left and no change after evaporation
	2
	S.Pellegrino Water
	White residue left in the shape of a droplet
	3
	Aquafina
	No residue left and no change after evaporation
Preparation of EDTA solution (10 pts)
Grams of EDTA required		0.1461g				
	
	Mass of EDTA
(Analytical Balance)
	Mass of 250 mL flask
(Top Loading Balance)
	Tare mass
	
	101.486g
	Gross mass
	
	349.61g
	Net mass
	0.1462g
	248.124g
· moles of EDTA =
· mass of water =248.124-0.1462=247.9778g
Concentration of EDTA (use correct units and number of significant figures!) (15 Pts)
Insert your group’s data sheet here. (10 pts)
· Quantitative Determination of Calcium Ion in Water Samples by Pellegrino Water (30 pts)
	
	Dist. Water
	Sample 1
	Sample 2
	Trial number
	1
	2
	3
	4
	5
	Brand Name
	N/A
	S.Pellegrino Water
	AguaFina
	Sample Volume (25.00 or 10.00 mL) 
	25
	10
	10
	25
	25
	Initial Volume 
(Vo) (in mL)
	0
	0
	0
	0
	13.30
	Final Volume (Vf)  (in mL)
	0.09
	38.3
	43.55
	13.30
	28.62
	Net Volume (in mL)
	=0.09-0=0.09
	=38.3-0 =38.3
	=43.55-0 =43.55
	=13.3-0
=13.

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