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A groundwater sample is taken from a geologic formation containing various carbonate minerals (e.g., CaCO3, MgCO3, CaCO3•MgCO3, etc.) without exposing the water sample to the atmosphere. Analysis of the sample indicates that CT,CO3 is 10-3 M, the pH is 7.6, and there are no other weak acids or weak bases in the sample.
(a) What is the ANC of this water?
(b) This groundwater sample (no solids present) is then brought into equilibrium with the atmosphere (PCO2 = 10-3.5 atm). Develop an equation that will allow you to determine the pH of this water. Solve for the pH. Ignore complexes and activity corrections.
The excess I2(aq) left over from the above reaction was titrated with 11.37 mL of 0.0105 M thiosulfate (S2O32-) as follows: I2(aq) + 2S2O32-(aq) → 2I1-(aq) + S4O62-(aq)
The vapor pressure of pure CH2Cl2 (with molecular weight 85 g/mol) is 133 torr at 0?C and the vapor pressure of pure CH2Br2 (with molecular weight 174 g/mol) is 11 torr at the same temperature.
An iron bar of mass 781 g cools from 94°C to 5°C. Calculate the heat released (in kilojoules) by metal.
A 1-L flask is filled with 1.10 g of argon at 25 C. A sample of ethane vapor is added to the same flask until the total pressure is 1.20 atm . What is the partial pressure of argon,PAr , in the flask?
draw,clearly showing the bonding between atoms, the simplest alkane molecule consisting of hydrogen and carbon, describe the molecule shape and bond angles.
you decide to use methyle red indicator instead of universal indicator for preparation of your pH color standard what effect have on your data?
The density of aluminum is 2.70 g/cm3 and the density of chromium, is 7.19 g/cm3. If equal masses of aluminum and chromium are transferred to equal volumes of water in separate graduated cylinders, which graduated cylinder would have the greatest ..
Consider the combustion of ammonia: 4 NH3(g) + 3 O2(g) 2 N2(g) + 6 H2O(g). If N2 is produced at the rate of 0.63 mol/s, what is the rate of consumption of NH3?
A sample of nitrogen gas is contained in a piston with a freely moving cylinder. At0?C, the volume of the gas is 248 mL. To what temperature must the gas be heated to occupy a volume of 479mL.
Compute the amount of heat needed to completely sublime 43.0 grams of solid dry ice at its sublimation temperature. (The heat of sublimation for carbon dioxide =32.3).
Calculate the pH of a solution prepared by dissolving 0.40g of Na2O in enough water to make 0.600 L of solution? Express your answer using two decimal places.
Calculate the pressure of the gas mixture and the partial pressure of each constituent gas if the mixture is in a 11.0 L vessel at 27 degree celsius
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