In the gas phase, acetic acid exists as an equilibrium of monomer and dimer molecules. (The dimer consists of two molecules linked through hydrogen bonds.) The equilibrium constant, K c , at 25 °C for the monomer-dimer equilibrium 2 CH 3 CO 2 H ⇄ (CH 3 CO 2 H) 2 has been determined to be 3.2 × 10 4 . Assume that acetic acid is present initially at a concentration of 5.4 × 10 −4 mol/L at 25 °C and that no dimer is present initially. (a) What percentage of the acetic acid is converted to dimer? (b) As the temperature increases, in which direction does the equilibrium shift? (Recall that hydrogen-bond formation is an exothermic process.)
In the gas phase, acetic acid exists as an equilibrium of monomer and dimer molecules. (The dimer consists of two molecules linked through hydrogen bonds.) The equilibrium constant, K c , at 25 °C for the monomer-dimer equilibrium 2 CH 3 CO 2 H ⇄ (CH 3 CO 2 H) 2 has been determined to be 3.2 × 10 4 . Assume that acetic acid is present initially at a concentration of 5.4 × 10 −4 mol/L at 25 °C and that no dimer is present initially. (a) What percentage of the acetic acid is converted to dimer? (b) As the temperature increases, in which direction does the equilibrium shift? (Recall that hydrogen-bond formation is an exothermic process.)
In the gas phase, acetic acid exists as an equilibrium of monomer and dimer molecules. (The dimer consists of two molecules linked through hydrogen bonds.)
The equilibrium constant, Kc, at 25 °C for the monomer-dimer equilibrium
2 CH3CO2H ⇄ (CH3CO2H)2
has been determined to be 3.2 × 104. Assume that acetic acid is present initially at a concentration of 5.4 × 10−4 mol/L at 25 °C and that no dimer is present initially.
(a) What percentage of the acetic acid is converted to dimer?
(b) As the temperature increases, in which direction does the equilibrium shift? (Recall that hydrogen-bond formation is an exothermic process.)
In the box below, specify which of the given compounds are very soluble in polar aprotic solvents. You may select more than one compound. Choose one or more: NaCl NH4Cl CH3CH2CH2CH2CH2CN CH3CH2OH hexan-2-one NaOH CH3SCH3
On the following structure, select all of the atoms that could ACCEPT a hydrogen bond. Ignore possible complications of aromaticity. When selecting be sure to click on the center of the atom.
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