Oceanic uptake of carbon dioxide is thus described: CO2 (g) + H2O ⇔ H2CO3, K = [H2CO3]/PCO2 = 3 x 10-2 M atm-1 H2CO3 ⇔ HCO3- + H+, K = [HCO3-][H+]/[H2CO3] = 9 x 10-7 moles/L HCO3- ⇔ CO32 - + H+, K = [CO32 -][H+]/[HCO3-] = 7 x 10-10 moles/L CaCO3 ⇔ Ca2+ + CO32- Kc = 4 x 10-9 M2 What is the full charge balance equation for this system?
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Oceanic uptake of carbon dioxide is thus described:
CO2 (g) + H2O ⇔ H2CO3, K = [H2CO3]/PCO2 = 3 x 10-2 M atm-1
H2CO3 ⇔ HCO3- + H+, K = [HCO3-][H+]/[H2CO3] = 9 x 10-7 moles/L
HCO3- ⇔ CO32 - + H+, K = [CO32 -][H+]/[HCO3-] = 7 x 10-10 moles/L
CaCO3 ⇔ Ca2+ + CO32- Kc = 4 x 10-9 M2
What is the full charge balance equation for this system?
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- Oceanic uptake of carbon dioxide is thus described:CO2 (g) + H2O ⇔ H2CO3, K = [H2CO3]/PCO2 = 3 x 10-2 M atm-1 H2CO3 ⇔ HCO3- + H+, K = [HCO3-][H+]/[H2CO3] = 9 x 10-7 moles/LHCO3- ⇔ CO32 - + H+, K = [CO32 -][H+]/[HCO3-] = 7 x 10-10 moles/LCharge balance equation:[H+] = [OH-] + [HCO3-] + 2[CO32 ] If the CO2 concentration in the atmosphere is 300 ppm, what is the pH of the ocean?When drinking water is disinfected with chlorine, an undesired byproduct, chloroform (CHCl3), may form. Suppose a 70-kg person drinks 2 L of water every day for 70 years with a chloroform concentration of 0.08 mg/L (the drinking water standard). Potency factor for chloroform = 6.1 x 10-3 (mg/kg-day)-1 The upper-bound cancer risk for this individual. a. 0.545 b. 5.45x10-6 c. 5.45x10-4 d. 5.45x10-10 e. 14x10-6 If a city with 300,000 people in it also drinks the same amount water described in the above question, how many extra cancers per year would be expected? Assume the standard 70-year lifetime. a. 0.163 b. 1.63x10-4 c. 1.63x10-3 d. 1.63x10-6 e. 6x10-2Sucrose is oxidized according to the following formula. C12H22O11 + O2 → CO2 + H2O You are investigating cellular metabolism in vitro. Under your experimental conditions, you plate 12 million cells in a dish using 10 ml of cell culture media. You grow the cells in a special instrument that can measure metabolic gases. After 24 hours, you instrument has detected that 28.8 mg of oxygen have been consumed and the same mass of carbon dioxide released. Your previous tests have shown that these cells consume 75 μg/106 cells-h. (a) Determine the limiting reagent, (b) percent excess of the other reagent, percent conversion for both reactants, and (c)extent of reaction (ξ). (d) Your initial concentration of sucrose in your cell culture media is 13.0mM. Your instrumentation can only resolve sucrose concentration at 0.1 mM increments. Can you detect the change in sucrose concentration with your instrumentation?
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- Nagyung wanted to determine the heat of dissolution for potassium chlorate (KClO3, MW: 122.55 g/mol) in water. He measured 10 grams of KClO3 and dissolved it in a calorimeter containing 250 g of water. The temperature drop was 3.5 K. What is qH2O? WHat is qrxn? WhaT IS THE change of dissolution of reaction? is the reaction exothermic or endothermic?Ammonia must be eliminated from wastewater before it can be reused, recycled, or discharged. Describe the three major steps that are used to convert harmful ammonia into a harmless derivative. Your answer must be specific and include any appropriate chemical formulas or names of chemical or biological reagents. Mention, when appropriate, the toxicity of any of the components or how their production can get in the way of efficiently eliminating ammonia from wastewater.Describe the basic principle employed to preserve food; you may mention chemical processes, unit operating principles in use, or uses of biological principles and reactions. Fermentation of vegetables Canning of sardines Drying of fish Preparation of mango jam Irradiation of corn and other cereal products Curing of ham Vacuum frying of potatoes Spray drying of fruit juices Brining of eggs (itlog maalat)