Determining pecent contribution to alkalinity from a solution
For a solution having .0025 equivalents/liter total alkalinity (contributions from HCO3- (negative one charge), CO3-- (negative two charge) and OH- (hydroxide)) at [H+] = 4.69E-11, what is the percentage contribution to alkalinity from CO3-- (negative two charge)? A hint was given: Calculate the bicarbonate concentration and ...continues
Mass of Carbon burned to increase the average carbon dioxide level
Taking the mass of the atmosphere to be 4.5E15 metric tons, what mass of carbon must be burned in order to increase the average carbon dioxide level in the atmosphere by 0.5 ppm by volume (in metric tons)? The only Hint given was: The average molar mass of air is 28.96 g/mol. Can you please work this problem out for ease o ...continues
Problem with Henry's constants and partial pressures
Consider the following aqueous route to oxidize SO2: SO2(aq) + H2O2(aq) -> H2SO4(aq) k = 1.1 X 10^3 L/mols a. The partial pressure and Henry's law constants for SO2 and H2O2 are 2.1 ppm (KH = 1.2 mol L-1atm-1) and 4.8 ppb (KH = 1.0E5 mol L-1atm-1), respectively. Calculate the reaction rate of this process. b. Calculate th ...continues
Stokes Law and particle sedimentation
Stokes' Law describing partial sedimentation is given by: Rate = [(gd^2)(Δρ)]/18η where g = 9.81 m s^-2 is gravitational acceleration. Δρ is the density difference between particles and the air, air viscosity of η = 1.36E-4 g cm^-1 s^-1 and d is the particle diameter in centimeters. a. Calcula ...continues
Hydrogen gas problem using ideal gas law
Consider a vehicle powered by hydrogen gas. a. About 3.1 kg of H2 is required for a vehicle to have a 500 km range. Assume ideal gas behavior and a storage tank of 60 L (a comparable size to conventional gasoline vehicles). What tank pressure atm might one expect at 25 degrees celsius? b. Since their discovery in 1991, tin ...continues
Calculating increase of BOD in water
If 900 kg of n-propanol are accidentally discharged into a body of water containing 1e8 liter of water. By how much is the BOD(mg/L) (biochemical oxygen demand) of this water increased? I don't even know what to do with this problem, please help and show me how to do it step by step... Thanks!
fraction of NTA after equilibrium is reached
What is the fraction of NTA present after HT2- has been brought to equilibrium with solid PbCO3 at pH 7.00, in a medium in which [HCO3-] = 1.75E-3 M? I've been trying to solve this using the equilibrium constant equation, but I just can seem to set it up and solve it correctly. Please help! Thanks!
Amount of coal needed to produce a pH of 2
How many metric tons of 5%-S coal would be needed to yield the H2SO4 required to produce a 5.0 cm rainfall of pH 2.00 over an area of 100 square kilometers? The only hint given was: calculate the volume of rain, mol H+, mass of S, mass of coal. If you could work out the problem for me, that would be great! It makes it easi ...continues
Determining Redox potentials of acid water
What is the redox potential of an acid mine water sample having Fe3+ = 7.00E-3 M and Fe2+ = 3.00E-4 M given that E0 (standard electrode potential) for the Fe3+/Fe2+ couple is 0.77V Again...I have failed at this problem several times so it would be great it you could work it out as well. Hint: Nernst equation.
Chemistry, General Chemistry Year 1 kinetics problem -------------------------------------------------------------------------------- The problem states In the reaction 2 A + 2 B -------arrow C + 3 D the rate of disappearance of A is -2.2 X 10^-4 M s -1. What is the rate of formation of C and the answer states is ...continues
