1. A rain sample has the following composition of major cations and anions, in µmol/L. Cations:...
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 ones listed.
Homework Answers
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1. A rain sample has the following composition of major cations
and anions, in µmol/L.
Cations:...
A sample of water has the following concentrations of ions (and pH = 7.0): cations...
A sample of water has the following concentrations of ions (and pH = 7.0): cations mg/L anions mg/L Ca+2 40.0 HCO3- 110.0 Mg+2 10.0 SO42- 67.2 Na+ ? Cl- 11.0 K+ 7.0 Assuming no other constituents are missing, use an anion-cation balance to estimate the concentration of Na+ (in mg/L as Na+)? Remember that the balance cannot be in mg/L.
1. The major ions in a groundwater sample were found to be the following: [Ca2+] =...
1. The major ions in a groundwater sample were found to be the following: [Ca2+] = 75 mg/L [Mg2+] = 40 mg/L [Na+] = 10 mg/L [HCO3-] = 300 mg/L, [CI] = 10 mg/L [SO42-] = 109 mg/L. (a) Calculate the concentration of each ion in molar units (e.g., M or mM) and equivalents per liter (Equivalents in this case is defined as the absolute value of the ion charge for 1 mole of the ion). (b) All environmental aqueous...
1. Aqueous solutions should be electrically neutral. In other words, cations and anions should be balanced...
1. Aqueous solutions should be electrically neutral. In other words, cations and anions should be balanced with each other (charge balance) The following table shows the composition of typical seawater. 1. Set up a charge balance equation for the seawater. (b) Analyze the seawater whether is neutral or not. Note that the seawater constituent are expressed in mass concentrations. Constituent mg/kg (ppm) Sodium (Na*) 10,500 1,350 400 380 Magnesium (Mg2) Calcium (Ca2") Potassium (K) Chloride (Cl) Sulfate (SO2) Bicarbonate (HCO3)...
For the water analysis given below, with pH = 8, find the following in ``mg/l as...
For the water analysis given below, with pH = 8, find the following in ``mg/l as CaCO3``: total hardness carbonate hardness noncarbonate hardness 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
6.22 A sample of water has the following concentrations of ions: mg/l 40.0 10,0 mg/l 110.0...
6.22 A sample of water has the following concentrations of ions: mg/l 40.0 10,0 mg/l 110.0 67.2 11.0 Cations Anions HCO; so Cl Mg Na " 7.0 (a) The concentration (expressed as mg/L) of slaked lime (CalOH)l added to the water to achieve the maximum practical softness. (b) The concentration (expressed as mg/L) of soda ash (Na,CO,) added to achieve the maximum practical softness.
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e ra TUTOR Solution Concentration 1 pt 1 pt A solution is made by dissolving 28 g of iron(III) bromide, FeBry, in enough water to make exactly 100 mL of solution. Calculate the concentration (molarity) of FeBr in mol L (M) Apt n 20 1 pt Cations Anions NH4 Li F on 21 1 pt ion 22 Na Ca2 Ba2 Ag Fe Fe3 Al3 Pb2- Br OH s2- co2 So PO4 1 pt Name: lead phosphate ОН tion 23 1...
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* 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
please help 9. (13 points) A sample of water has the following concentrations of ions, assuming...
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9. (13 points) A sample of water has the following concentrations of ions, assuming no other constituents are missing: Cations mg/L Anions mg/L Ca 40 HCOị 100 Mg? 10 CO;2- 100 Na ? SO/2 67.2 K Ch 11 н — | ОН ? (a) If the solution has the pH of 10.2, what are the concentrations of H' and OH? For H,O-> H + OH, the equilibrium constant equals 10.(3 points) (b) Use an anion-cation balance to estimate...
1. The major ions in a groundwater sample were found to be the following: [Ca2+] = 75 mg/L [Mg2+] = 40 mg/L [Na+] = 10 mg/L [HCO3-] = 300 mg/L, [CI] = 10 mg/L [SO42-] = 109 mg/L. (a) Calculate the concentration of each ion in molar units (e.g., M or mM) and equivalents per liter (Equivalents in this case is defined as the absolute value of the ion charge for 1 mole of the ion). (b) All environmental aqueous...
1. Aqueous solutions should be electrically neutral. In other words, cations and anions should be balanced with each other (charge balance) The following table shows the composition of typical seawater. 1. Set up a charge balance equation for the seawater. (b) Analyze the seawater whether is neutral or not. Note that the seawater constituent are expressed in mass concentrations. Constituent mg/kg (ppm) Sodium (Na*) 10,500 1,350 400 380 Magnesium (Mg2) Calcium (Ca2") Potassium (K) Chloride (Cl) Sulfate (SO2) Bicarbonate (HCO3)...
6.22 A sample of water has the following concentrations of ions: mg/l 40.0 10,0 mg/l 110.0 67.2 11.0 Cations Anions HCO; so Cl Mg Na " 7.0 (a) The concentration (expressed as mg/L) of slaked lime (CalOH)l added to the water to achieve the maximum practical softness. (b) The concentration (expressed as mg/L) of soda ash (Na,CO,) added to achieve the maximum practical softness.
Table 1. Chemical composition of two water samples. Parameter Sample A Sample B pH 6.5 6.8 Alkalinity (mg L1 as CaCO3) K* (mg L Na (mg L) Mg2 (mg L-) Ca2 (mg L1) NO3 (mg L) Cr (mg L.) SO2- (mg L.1) 340 45 32 1.4 14 2700 160 6.7 4500 140 2.4 0.1 31 9800 44 16 PO4-P (mg L.1) 0.28 0.12 Density (kg L1) 1.012 1.000 f) Calculate the charge balance error for both samples. Is there any...
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9. (13 points) A sample of water has the following concentrations of ions, assuming no other constituents are missing: Cations mg/L Anions mg/L Ca 40 HCOị 100 Mg? 10 CO;2- 100 Na ? SO/2 67.2 K Ch 11 н — | ОН ? (a) If the solution has the pH of 10.2, what are the concentrations of H' and OH? For H,O-> H + OH, the equilibrium constant equals 10.(3 points) (b) Use an anion-cation balance to estimate...
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