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For the reaction 2O (g) ⇌ O2 (g), it has an equilibrium constant (K) of 1.5.
a) If at a certain time, the concentration of O is [O] = 0.5M and concentration of O2 is
[O2] = 0.8M, what is the reaction quotient (Q)?
b) Based on your answer in part a, will the reaction proceed forward or reverse? Why?
What is the pH of a 0.02M solution of HCl?
The solubility product (Ksp) is 0.005 for the reaction below,
Ba (OH)2 (s) ⇌ Ba2+ (aq) + 2OH- (aq)
If the initial concentration of Ba (OH)2 is [Ba(OH)2] = 2M, what is the concentration of
[H3O+] at equilibrium?
In a saturated solution of PbBr2, the molarity of Pb2+ ions are 8.2 x 10-2 mol/L, how
much would be the [Br-1] in g/L? (MBr=40 gr/mol)
A solution of hydrofluoric acid has a molar concentration of 0.01 mol/L, what is the pOH
of the solution? Ka=6.6x 10^-39
The solubility product (Ksp) is 0.005 for the reaction below,
Ba (OH)2 (s) ⇌ Ba2+ (aq) + 2OH-(aq)
If the initial concentration of Ba (OH)2 is [Ba(OH)2] = 2M, what is the concentration of
[H3O+] at equilibrium?
The amount of iron in a meteorite is determined by a redox titration using KMnO4 as the titrant. A 0.4185-g sample is dissolved in acid and the liberated Fe3+ quantitatively reduced to Fe2+ using a Walden reductor. Titrating with 0.02500 M KMnO4 requires 41.27 mL to reach the endpoint. Determine the %w/w Fe2O3 in the sample of meteorite.
How precision can be improved justify your opinion from stats point of view
1. Ten grams of plastic beads with a density of 1.2 g/cm3 are added to 500 ml of an organic solvent with a density of 0.80 g/cm3. What is the concentration of plastic beads in mg/L?
A single atom of an unknown element weighs 9 x 10 -23g. What is the atomic weight of
the element?
