1. The major ions in a groundwater sample were found to be the following: [Ca2+] =...
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
4- Giving the following analysis of groundwater, a) Construct a bar chart of the constituents, expressed as CaCO3. b) Determine the amount of lime soda as CaCO3 necessary to soften the water to 80.00 mg/L hardness CaCO3. Ion mg/L mg/L as CaCO3 Ca2+ 134 Mg2+ 7.2 Nat HCO 20.8 331.5 63.7 SO42- CL 48.1 NO2 50.5 ORP 32.3
Question 30 (4 points) Groundwater defined by the following analysis is to be softened by lime-soda ash treatment. The target total hardness is 90 mg/L as CaCO3, in which CH = 40 mg/L as CaCO3 CO2 = 30 mg/L as CO2 = 120 mg/L as Ca2+ Ca2+ Mg2+ = 48 mg/L as Mg2+ Nat = 46 mg/L as Nat HCO3 = 200 mg/L as Cacos SO42- 96 mg/L as SO42- 35 mg/L as CI FORMULA CO2 CaCO3 EQUIVALENT WEIGHT (S/EW)...
Part A: Problem solving section 1. In last week homework students were determining the total hardness, carbonate hardness, non-carbonate hardness and the alkalinity of the following groundwater sample: Ca2+ = 94 mg/L Mg2+ = 24 mg/L Nat = 14 mg/L HCO3 = 317 mg/L SO42- = 67 mg/L Cl = 24 mg/L Build hardness bar chart and calculate the stoichiometric amount of lime and soda ash needed to soften this water sample.
Determine the lime and soda ash dose, in mg/l as CaCO3, to soften the following water to a final hardness of 80 mg/l as CaCO3. The ion concentrations reported below are all in mg/l as CaCO3. Ca2+ = 120 Mg2+ = 30 HCO3- = 70 CO2 = 10
The following analysis has been reported for a sample of contaminated groundwater obtained near an aluminum production facility: pH = 11.2 Cl- = 1,100 mg/L Na+ = 6,500 mg/L F- = 4,350 mg/L K+ = 2,230 mg/L DIC = 1,740 mg/L (as C) Ca2+ = 3,400 mg/L SO42- = 3;940 mg/L Mg2+ = 1,350 mg/L OH- = 10-2.8 mol/L (a) Check the charge balance for this analysis. Does the total cationic charge (in equiv/L) equal the total anionic charge to...
Based on question 2, how would you go about solving question number 9? Please solve question number 2 and 3 if possible. 2. (10 points) A groundwater in California has the following water quality characteristics. From the analysis shown below, determine the total hardness, carbonate hardness and noncarbonate hardness of the groundwater. Express your answers in units of mg/L as CaCO3 and as meq/L. Constituent Units Concentration or Value 10 90 40 30 10 3.1 Carbon Dioxide (CO2) Calcium (Ca2+)...
1. A rain sample has the following composition of major cations and anions, in µmol/L. Cations: H+: 60; Ca2+: 10; Mg2+: 15; Na+: 60; K+: 5; NH4+: 40. Anions: Cl-: 60; NO3-: 42. What is the sum of positive charges of that sample, in µmol/L? 2. Of that same sample, estimate the concentration of SO42-, in µg/L, in that sample if you assume a charge balance in the sample and no other major anions or cations present other than the...