Methyl salicylate (oil of wintergreen) is prepared by heating salicylic acid, C7 H6O3 , with methanol, CH3OH. C7 H6O3 + CH3OH → C8H8O3 + H2O In an experiment, 2.50 g of salicylic acid is reacted with 10.31 g of methanol. The yield of methyl salicylate, C8H8O3, is 1.27 g. What is the percentage yield?

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combustion chamber is fed with butane and excess air. Combustion of butane is complete. The composition of combustion gases on volume basis is given below : CO2= 9.39%, H2O = 11.73%, O2= 4.70% and N2 = 74.18% Find % excess air used and mole ratio of air to butane used.

Glycol is produced on commercial scale from ethylene oxide reactant, which is made by the partial oxidation of ethylene with an excess of air over a silver catalyst.The primary reaction is2C2H4 + O2 → 2C2H4OUnfortunately, some of the ethylene also undergoes complete oxidation to CO2 and water via the following reactionC2H4 + 3O2 → 2CO2+ 2H2OSuppose for a feed containing 10% ethylene, an ethylene conversion of 25% and an oxide yield of 80% is obtained from the reactant. Calculate the composition of the reactor outlet stream under such operating conditions

8.6 Styrene was added to a solution of sodium naphthal ene in tetrahydrofuran at 25°C so that the initial concentrations of styrene and sodium naphthalene in the reaction mixture were 0.2 mol/L and 0.001 mol/L, respectively. Five seconds after the addition of styrene its concentration was determined to be 1.73x10-3 mol/L. Calculate (a) overall propagation rate constant; (b) initial rate of polymerization; (c) rate of polymerization after 10 s; and (d) number average molecular weight of the polymer after 10 S. [Ans. (a) kp = 950 L mo!- s; (b) (Rp), = 0.190 mol L-s; (c) (Rp)10s = 1.422x10-5 mol L- s-1; (d) (Mw)10s %3D %3D 20800]

The ethyl acetate concentration in an alcoholic solution was determined by diluting a 10.00-mL sample to 100.0 mL. A 20.00-mL aliquot of the diluted solution was refluxed with 40.00 mL of 0.04672 M KOH: CH3COOC2H5 + OH- → CH3COO- + C2H5OH After cooling, the excess OH- was back-titrated with 3.41 mL of 0.05042 M H2SO4. Calculate the number of grams ethyl acetate (FW 88.11 g/mol) per 100 mL of the original solution.

A mixture is 12.5 weight % propylene (C3H6), 12.5 weight % benzene (C6H6), and 75.0 weight % cumene (C9H12). For the mixture described above, calculate the average molecular weight of the mixture (g/mol).

Methanol (CH3OH) and its derivative products are used as base materials in acrylic plastic, synthetic fabrics, adhesives, paints and as chemical agent in pharmaceuticals and agrichemicals. In petrochemical industry, one promising pathway to produce methanol is from conversion of syngas to methanol via hydrogenation of carbon dioxide and carbon monoxide. The reaction of this process is given as follows, CO + 2H2 → CH3OH (1) CO2 + H2 → CO + H20 (2) Suppose 1000 kmol/hr of syngas with molar composition of 22% CO2, 6.7% CO, 65% H2, 4.1% H20, 1.1% CH4 and 1.1% N2 is used as fresh feed. (a) Draw and label a complete process flow diagram of this process. (b) Calculate the amount of unreacted CO2 if given single pass conversion of CO2 is 14.2%. (c) Calculate the extent of reaction for the side reaction (2) and the amount of water produced. (d) If the selectivity of methanol to water is 92.1%, calculate the amount of methanol produced. (e) Determine mole fraction of CH3OH, CO2, CO, H2, H2O, CH4…

Sulfur dioxide is a toxic gas that gives off the smell of burnt matches. It is also a by-product of copper extraction and the burning of fossil fuels (coal and oil) that are contaminated with sulfur compounds. This leads to sulfur dioxide in the atmosphere. Sulfur trioxide, a product of sulfur dioxide, is also a pollutant, as well as a component in acid rain. Consider the following reaction at equilibrium for the questions below: 2SO2 (g) + O2 (g) ⇌ 2SO3 (g) f. Is the product that is produced from this reaction polar or non-polar? g. Identify the type(s) of intermolecular forces that are present in the product that is produced from this reaction. h. Write the equilibrium-constant expression (Kp) for the given equilibrium reaction, which is taking place in the production of sulfur trioxide. i. Consider the equilibrium reaction given above. Consider an experiment where 1.50 mol sulfur dioxide gas and 1.50 mol oxygen gas are combined in a 1.00 L flask at 727°C with a Kp value of 4.13 x…

A 10 N aqueous solution of sulfuric acid (30°Tw) is made to react with a 55% aqueous solution of sodium hydroxide (64"Be) to form 1350 g of sodium sulfate per liter of· sodium hydroxide solution. The volume ratio of the acid to the base solution is 2:1. The limiting reactant in the reaction is