Cations |
mg/l |
Anions |
mg/l |
|
Na+ |
20 |
Cl- |
40 |
|
K+ |
40 |
HCO3- |
47 |
|
Ca2+ |
10 |
CO32- |
10 |
|
Mg2+ |
10 |
SO4-2 |
5 |
|
Fe2+ |
2 |
NO3- |
10 |
For the water analysis given below, with pH = 8, find the following in ``mg/l as...
3. For the water analysis given below, with pH = 8, find the following in mg/l as CaCO3 a) total hardness b) carbonate hardness c) noncarbonate hardness mg/l Cations Na* K* mg/ 20 40 Anions CI- НСО, 40 47 Ca2 CO2 SO-2 Mo- 10 NO
Groundwater is defined by the following analysis: Ca2+ = 80 mg/L as Ca2+ Mg2+ - 55 mg/L as Mg2+ HCO3-350 mg/L as CaCO3 pH = 8.0 FORMULA CaCO3 Ca2+ Mg2+ EQUIVALENT WEIGHT (g/EW 50 20 12.2 61 HCO3 mg as CaCO3 L mg Equivalent Weight of CaCo3 (g/EW) as species X L Equivalent Weight of Species (g/EW) Noncarbonate hardness (NCH) of the raw water, in mg/L as CaCO3, is: 1) 55.0 2) 76.3 3) 135.0 4) 200.0 5) 350.0
(35 points) For the following water sample please complete the table (meq/L and mg/L as CaCO3) and the questions that follow (Remember - 50 mg CaCO3/meq CaCO3) lon mg/L mg/meq meq/L (Please fill in the values below) as CaCO3 mg/L HCO3 125 61.0 2- 35 250 30.0 Mg K* Fe2 Mn2+ SO.2 NO3 NO2 Ca2 12.2 100 39.1 27.9 175 12 27.5 300 48.0 62.0 2 0.1 46.0 155 125 20.0 CI Na* 35.5 25 23.0 pH 7.0 (15 points)...
* An analysis of a sample of water with PH-7.5 has produced t following concentrations (mg/l). (Answer the following two questions) Cations Anions 102 Cl HCO3150 SO4 Na 50 4 260 Ca 46 Mg 26 4. The total dissolved solids in mg/l a) 588 b) 540 38 d) 238 e)None 5. The Non-carbonate hardness in mg/l as CaCO is: a) 98.75 c) 122.95 d) Zero e)None
#1 A water sample contains 60 mg/L of calcium, 60 mg/L of magnesium, and 25 mg/L of sodium. Assuming the alkalinity of the water is 394 mg/L CaCO3. Estimate Total Hardness, Carbonate Hardness, and Noncarbonate Hardness using all polyvalent cations. #2 What is the % error using only the predominant cations? #3 Construct a bar chart to determine the speciation of the hardness
Ca(OH)2 is added to water to reach a concentration of 53 mg/L. Initially, the water had 3.09 mg/L of Mg2+ and it reacts with Ca(OH)2 according to equation 61a. Assume SO4-2 is in excess. What are the final dissolved Ca2+and Mg 2+ concentrations? What is the initial and final hardness? What is the Mg(OH)2 precipitate concentration? (28.6 mg/L, 0 mg/L, 12.5 mg CaCO3/L, 71.5 mg CaCO3 /L, 7.28 mg/L). Precipitation of noncarbonate Mg, leaving Ca from lime in solution. Mf+...
The following water quality data are available for a community Water quality Ca2+ = 60 mg/l (as species) Mg2+ = 40 mg/l (as species) HCO3- = 220 mg/l as CaCO3 CO2 = 7 mg/l (as species) pH = 7.6 Final desired hardness = 80 mg/l as CaCO3. The flow rate of the treatment plant is 0.24 m3/s. a. Calculate the total, carbonate, and non-carbonate hardness b. Calculate the amount of lime (as mg/l of CaO) needed to soften the water...
#1 [5 pts) A water sample contains 60 mg/L of calcium, 60 mg/L of magnesium, and 25 mg/L of sodium. Assuming the alkalinity of the water is 394 mg/L CaCO3. Estimate Total Hardness, Carbonate Hardness, and Noncarbonate Hardness using all polyvalent cations.
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...
(6 points) A chemical analysis of a surface water sample yields the following data: Concentration (mg/L) Ion Ca2+ Mg2+ Fe2 K+ CI SO..2 HCO, CO;2- pH a. Find the alkalinity (in mol/L) b. Find the hardness as mg CaCO/L.