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Calculate the equilibrium constant (K eq ) for the following system at 250 o C:PCl 5(g) PCl 3(g) + Cl 2(g)
At equilibrium, the gases in the flask had the following concentrations:
[PCl 5(g) ] = 0.012 mol/L, [PCl 3(g) ] = 0.015 mol/L, and [Cl 2(g) ] = 0.015 mol/L.
calculate the pressure change needed to completely hydrogenate this substance at room temperature and 50 degrees celcius.
Problem- A volume of 80.0mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 21.7mL of 1.50 M H2SO4 was needed
Calculate the pH of a buffer made with 0.50 M phosphoric acid and 0.75 M sodium dihydrogen phosphate. Ka = 7.5 x 10^-3
The first members of periodic groups are often noted for their "anomalous" behaviour. Discuss some of the properties of
A) Calculate the molar solubility of Ni(OH)2 when buffered at pH=8.0 B) Calculate the molar solubility of Ni(OH)2 when buffered at pH=10.0 C)
a solution is prepared by dissolving 15.0g of nh3 in 250g of water. the density of resulting solution is 0.974gml.
Calculate the concentration of dissolved oxygen at 20 degree Celsius if the amount of dissolved O2 is 9.07 mg/L
Question- How does the ratio of SO2/SO3 change after heat is added to the following, and a new equilibrium is established: SO2 + ½ O2 SO3
The atomic radius of K is 227 pm as well as that of K+ is 138 pm. Compute the percent decrease in volume that take place when K(g) is converted to K+(g). The volume of a sphere is 4/3p3, where r is the radius of the sphere.
What do you think will happen when baking soda and vinegar come in contact (what will be produced)?
What is the approximate pH at the equivalence point of a weak acid-strong base titration if 25 mL of aqueous formic acid requires 29.80 mL of 0. 3567 M NaOH? Ka =1.8 × 10-4 for formic acid.
Explain the valences for each, showing what may happen to the electronic structure in each case
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