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2. Geochemists are concerned with the chemistry of natural waters because it affects drinking water quality and ecosystem health. A wa has the following chemical analysis: Na+ K+ Ca²+ Mg2+ Sr²+ Temp 120.0 ppm 15.00 ppm 380.0 ppm 22.00 ppm 0.8000 ppm 25.00°C SO C HCO3²- SiO₂ pH 1115 ppm 15.00 ppm 150.0 ppm 21.0 ppm 7.400 a. What are these concentrations in mmol/kg (use excel)? b. Do the charges balance (total positive charges = total negative arges)? c. Would you want to drink this water? Why or why not?

2. Geochemists are concerned with the chemistry of natural waters because it affects drinking water quality and ecosystem health. A wa has the following chemical analysis: Na+ K+ Ca²+ Mg2+ Sr²+ Temp 120.0 ppm 15.00 ppm 380.0 ppm 22.00 ppm 0.8000 ppm 25.00°C SO C HCO3²- SiO₂ pH 1115 ppm 15.00 ppm 150.0 ppm 21.0 ppm 7.400 a. What are these concentrations in mmol/kg (use excel)? b. Do the charges balance (total positive charges = total negative arges)? c. Would you want to drink this water? Why or why not?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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2. Geochemists are concerned with the chemistry of natural waters because it affects drinking water quality and ecosystem health. A wa has the following chemical analysis: Na+ K+ Ca²+ Mg2+ Sr²+ Temp 120.0 ppm 15.00 ppm 380.0 ppm 22.00 ppm 0.8000 ppm 25.00°C SO CI a. What are these concentrations in mmol/kg (use excel)? F a. MnO₂ b. MnO HCO3²- SiO₂ pH c. Fe304 d. MnCO3 b. Do the charges balance (total positive charges = total negative marges)? c. Would you want to drink this water? Why or why not? 1115 ppm 15.00 ppm 150.0 ppm 21.0 ppm 7.400 3. Do the following calculations related to concentrations of soldions: a. What is the concentration of Ca²+ (in ppm, i.e. mg/l) in a 4.70 x 105 M solution b. of CaCl2? What is the concentration of CaCl₂ (in ppm) in the same solution? You need to prepare 100.0 mL of a 10.0 mg/l solution of NO from KNO3 powder. How much KNO3 do you need to add? What would be the resulting concentration of K (in mol/l and mg/l)? 4. What is (are) the oxidation state(s) of manganese or iron in each of the following compounds? ts e. Fe₂O3 5. What of the series has the greatest percent ionic character and which has the least? a. PbSO4, BaSO4, SrSO4, or RaSO4 b. MgCO3, MnCO3, CaCO3, or SrCO3. c. NaCl, KCl, or LiCl 6. The ideal chemical formula of the mineral albite is NaAlSi3Os. How many moles of NaAlSi308 do 5g of the mineral contain? How many moles of Si? 7. A geologist has identified two iron deposits. One of them contains 100.0 million tons of magnetite (Fe3O4), and the other contains 20.0 million tons of magnetite (Fe3O4), and 80.0 million tons of hematite (Fe₂O3). Based on the iron content alone, which of the two deposits should be recommended for mining? Gram atomic weights of the elements: Fe = 55.85; O 16.00.
Transcribed Image Text:2. Geochemists are concerned with the chemistry of natural waters because it affects drinking water quality and ecosystem health. A wa has the following chemical analysis: Na+ K+ Ca²+ Mg2+ Sr²+ Temp 120.0 ppm 15.00 ppm 380.0 ppm 22.00 ppm 0.8000 ppm 25.00°C SO CI a. What are these concentrations in mmol/kg (use excel)? F a. MnO₂ b. MnO HCO3²- SiO₂ pH c. Fe304 d. MnCO3 b. Do the charges balance (total positive charges = total negative marges)? c. Would you want to drink this water? Why or why not? 1115 ppm 15.00 ppm 150.0 ppm 21.0 ppm 7.400 3. Do the following calculations related to concentrations of soldions: a. What is the concentration of Ca²+ (in ppm, i.e. mg/l) in a 4.70 x 105 M solution b. of CaCl2? What is the concentration of CaCl₂ (in ppm) in the same solution? You need to prepare 100.0 mL of a 10.0 mg/l solution of NO from KNO3 powder. How much KNO3 do you need to add? What would be the resulting concentration of K (in mol/l and mg/l)? 4. What is (are) the oxidation state(s) of manganese or iron in each of the following compounds? ts e. Fe₂O3 5. What of the series has the greatest percent ionic character and which has the least? a. PbSO4, BaSO4, SrSO4, or RaSO4 b. MgCO3, MnCO3, CaCO3, or SrCO3. c. NaCl, KCl, or LiCl 6. The ideal chemical formula of the mineral albite is NaAlSi3Os. How many moles of NaAlSi308 do 5g of the mineral contain? How many moles of Si? 7. A geologist has identified two iron deposits. One of them contains 100.0 million tons of magnetite (Fe3O4), and the other contains 20.0 million tons of magnetite (Fe3O4), and 80.0 million tons of hematite (Fe₂O3). Based on the iron content alone, which of the two deposits should be recommended for mining? Gram atomic weights of the elements: Fe = 55.85; O 16.00.
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