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In the Mond process for the purifi cation of nickel, CO is passed over metallic nickel to give Ni(CO)4:
Ni(s) + 4CO(g) ? Ni(CO)4(g)
Given that the standard free energies of formation of CO(g) and Ni(CO)4(g) are 2137.3 kJ/mol and 2587.4 kJ/mol, respectively, calculate the equilibrium constant of the reaction at 80°C. (Assume DG°f to be independent of temperature.)
A solution was prepared by mixing 25.00 mL of 0.080 0 M aniline, 25.00 mL of 0.060 0 M sulfanilic acid, and 1.00 mL of 1.23 × 10-4 M HIn and then diluting to 100.0 mL. (HIn stands for protonated indicator.)
The absorbance measured at 550 nm in a 5.00-cm cell was 0.110. Find the concentrations of HIn and In- and pKa for HIn.
Suppose you start with a mixture of 1.00 mol CO and 4.00 mol H2 in a 10.00-L vessel. Find the moles of substances present at equilibrium at 1200 K for the reaction
You will get an equation of the form
f (x) = 3.92
where f(x) is an expression in the unknown x (the amount of CH4). Solve this equation by guessing values of x, then computing values of f(x). Find values of x such that the values of f(x) bracket 3.92. Then choose values of x to get a smaller bracket around 3.92. Obtain x to two significant figures.
