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A sample of water from Lake Huron has a pH of 7.34 and an alkalinity of 1.21 mmol L-1 as calcium carbonate. Assume equilibrium with the calcium carbonate in the sediment and calculate the concentration of calcium ion (in mg/L -1) in the water (25C). What assumptions are made in carrying out the calculation?
30.0 mL of 0.100-M formic acid (Ka = 1.80×10-4) is titrated with 0.100-M NaOH. What is the initial pH of the formic acid solution? What is the pH of the solution after 12.0 mL NaOH has been added?
53.0 mL of a 1.70 M solution is diluted to a volume of 278 mL. A 139-mL portion of that solution is diluted using 189 mL of water.
A metal, M, was converted to the chloride, MCl2. Then a solution of the chloride was treated with silver nitrate to give silver chloride crystals, which were filtered from the solution.
Assuming the delta S does not change with temperature, estimate the temperature at which iodine would sublime.
When 6.533 g of silver nitrate reacts with excess aluminum, how many grams of silver metal and aluminum nitrate forms?
What is the volume of the gas at STP conditions? b.) What is the molar volume of the gas?
What is the composition in mole fractions of the gas mixture that is expelled? The solubilities of CH4 and C2H6 at 20 degrees celcius and 1 atm are .0175 g/L H20 and .059g/L H2O, respectively.
a solid,is thought to be either zinc or lead(2)nitrate.how are we going to determine the identity of the solid?
Isotopes Decay, Isotopes decay according to first order kinetics with a predictable half life
SO2 at 1000oC S + O2 2SO2 + O2 2SO3 at 500 oC with a vanadium catalyst SO3 + H2O H2SO4 And what would be do with this sulfuric acid?
A sample of vinegar has a freezing point depression of 20 degrees C. What is the estimated percent by mass of acetic acid in the vinegar? Molar mass of acetic acid is 60g/mol.
Calculate the volume change associated with the adiabatic expansion b) Calculate the heat flow, work and entropy
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