explain chemical essence of hardness determination??
Homework Answers
Chemically, the hardness present in water is due to the presence
of calcium and magnesium salts (CaCO3, MgCO3 etc). Due to this, It
is not suitable for drinking, bathing, washing and this also causes
some diseases like scales in
boilers. So, it is very much important to determine the hardness of
water. After determining hardness, we have remove these hardness
producing substances by chemical treatment. This is the chemical
essence of hardness determination.
determination of water hardness need help finding molarity and number of moles Determination of Water Hardness Re...
determination of water hardness
need help finding molarity and number of moles
Determination of Water Hardness Repo Repov Shee Name Sofia cortez 8:00 am Time M T W Mass of CaCO, sample 377 250 Vol. Cat solution prepared Molarity of Ca2+ Moles of Ca2+ in each aliquot titrated mol Number of moles of Caco, in sample (M.W. = 100.1 g/mol) mol
25.8 EXPERIMENT 4: DETERMINATION OF WATER HARDNESS DATA SHEET PART II: TESTING FOR TOTAL WATER HARDNESS...
25.8 EXPERIMENT 4: DETERMINATION OF WATER HARDNESS DATA SHEET PART II: TESTING FOR TOTAL WATER HARDNESS 0.0100M Concentration of EDTA used Sample 1 25.0 22.35 22.15 Sample 2 25.0 21.7. Sample 3 35.0 21.7 Vol Hard Water Solution Vol EDTA Moles EDTA Average Moles EDTA Moles of Ca2+ Moles of CaCO3 Mass of CaCO3 Mass of Hard Water Solution Total Hardness (ppm)
In determination of water hardness with EDTA, If your blank solution required a large volume of...
In determination of water hardness with EDTA, If your blank solution required a large volume of titrant to cause a colour change (come to the end point), what information about the hardness of your sample can you draw from this observation ?
CALCIUM HARDNESS DETERMINATION Fill a 50 mL burette with 0.01 M EDTA solution, making sure the...
CALCIUM HARDNESS DETERMINATION Fill a 50 mL burette with 0.01 M EDTA solution, making sure the tip is full and free of air bubbles. Set Start volume. Add 50.00 mL of an unknown hard water solution into a 100 mL beaker. Obtain Magnetic Stirrer from Equipment menu. Place beaker on stirrer. Increase Stir from the context menu. Add 4 mL of 1.0 M Sodium Hydroxide. Add 100 mg of Murexide indicator. Titrate with the 0.01 M EDTA until the color...
Name Section QUESTIONS: EXPERIMENT 17 Date 1 In a hardness of water determination like the one...
Name Section QUESTIONS: EXPERIMENT 17 Date 1 In a hardness of water determination like the one performed in this experiment, it was found that a 25.00-ml sample of water required 12.25 mL of 0.0128 M EDTA solution for complete titration. What is the concentration (molarity) of Ca2+ ions in the water sample? What is the concentration of Caco (in mg/L) in the water sample? Describe the hardness level of the wate using the U.S. government standards, Ca?molarity CaCO3 concentration, mg/L_...
Name Section Date QUESTIONS: EXPERIMENT 17 1. In a hardness of water determination like the one...
Name Section Date QUESTIONS: EXPERIMENT 17 1. In a hardness of water determination like the one performed in this experiment, it was found that a 25.00-ml sample of water required 12.25 ml of 0.0128 M EDTA solution for complete titration. What is the concentration (molarity) of Ca ions in the water sample? What is the concentration of CaCO; (in mg/L) in the water sample? Describe the hardness level of the water using the U.S. government standards. Camolarity CaCO3 concentration, mg/L_...
The chemical composition of a water sample is given in the table below. The goal hardness...
The chemical composition of a water sample is given in the table below. The goal hardness is 80 mg/L as CaCO3 Water composition (mg/L): Ca2+ HCO3 15 SO42- Na* CO2 242 Mg2+ 56 (a) Convert the given ionic concentrations in mg/L to mg/L as CaCO3 (b) What is the total hardness, carbonate hardness and non-carbonate hardness? (C) What is the lime-soda dosage to soften the water to a hardness of 80 mg/L as CaCO3 (d) What is the annual cost...
Explain providing the example the essence of delegation as managerial tool
Explain providing the example the essence of delegation as managerial tool
Physical or Chemical Property or Change Decomposing a substance by heating it Hardness of a diamond...
Physical or Chemical Property or Change Decomposing a substance by heating it Hardness of a diamond Cereal floats on top of milk Slicing up a pizza
Chapter 15 Determination of the Hardness of Water 3, A 100-mL. sample of hard water is...
Chapter 15 Determination of the Hardness of Water 3, A 100-mL. sample of hard water is titrated with the EDTA solution in Problem 2. The same amount of Mg' is added as previously, and the volume of EDTA required is 31.84 mL a What volume of EDTA is used in titrating the Ca" in the hard water? mL h How many moles of EDTA are there in that volume? moles c. How many moles of Ca are there in the...
determination of water hardness
need help finding molarity and number of moles
Determination of Water Hardness Repo Repov Shee Name Sofia cortez 8:00 am Time M T W Mass of CaCO, sample 377 250 Vol. Cat solution prepared Molarity of Ca2+ Moles of Ca2+ in each aliquot titrated mol Number of moles of Caco, in sample (M.W. = 100.1 g/mol) mol
25.8 EXPERIMENT 4: DETERMINATION OF WATER HARDNESS DATA SHEET PART II: TESTING FOR TOTAL WATER HARDNESS 0.0100M Concentration of EDTA used Sample 1 25.0 22.35 22.15 Sample 2 25.0 21.7. Sample 3 35.0 21.7 Vol Hard Water Solution Vol EDTA Moles EDTA Average Moles EDTA Moles of Ca2+ Moles of CaCO3 Mass of CaCO3 Mass of Hard Water Solution Total Hardness (ppm)
Name Section QUESTIONS: EXPERIMENT 17 Date 1 In a hardness of water determination like the one performed in this experiment, it was found that a 25.00-ml sample of water required 12.25 mL of 0.0128 M EDTA solution for complete titration. What is the concentration (molarity) of Ca2+ ions in the water sample? What is the concentration of Caco (in mg/L) in the water sample? Describe the hardness level of the wate using the U.S. government standards, Ca?molarity CaCO3 concentration, mg/L_...
Name Section Date QUESTIONS: EXPERIMENT 17 1. In a hardness of water determination like the one performed in this experiment, it was found that a 25.00-ml sample of water required 12.25 ml of 0.0128 M EDTA solution for complete titration. What is the concentration (molarity) of Ca ions in the water sample? What is the concentration of CaCO; (in mg/L) in the water sample? Describe the hardness level of the water using the U.S. government standards. Camolarity CaCO3 concentration, mg/L_...
The chemical composition of a water sample is given in the table below. The goal hardness is 80 mg/L as CaCO3 Water composition (mg/L): Ca2+ HCO3 15 SO42- Na* CO2 242 Mg2+ 56 (a) Convert the given ionic concentrations in mg/L to mg/L as CaCO3 (b) What is the total hardness, carbonate hardness and non-carbonate hardness? (C) What is the lime-soda dosage to soften the water to a hardness of 80 mg/L as CaCO3 (d) What is the annual cost...
Physical or Chemical Property or Change Decomposing a substance by heating it Hardness of a diamond Cereal floats on top of milk Slicing up a pizza
Chapter 15 Determination of the Hardness of Water 3, A 100-mL. sample of hard water is titrated with the EDTA solution in Problem 2. The same amount of Mg' is added as previously, and the volume of EDTA required is 31.84 mL a What volume of EDTA is used in titrating the Ca" in the hard water? mL h How many moles of EDTA are there in that volume? moles c. How many moles of Ca are there in the...
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