The equilibrium constant (K_hydr) for hydration of acetone (CH3COCH3) is 2×10^(–3). This translates into a very small percent conversion to the corresponding hydrate.
Would you expect the (K_hydr) for hexafluoroacetone (CF3COCF3) to be smaller or larger than that for acetone? Choose from the choices below.

a. Smaller. The CF3 groups are bulky and will sterically repel each other when hexafluoracetone is in its hydrated form.
b. Larger. The CF3 groups are strongly electron-withdrawing, thus increasing the electrophilicity of the carbonyl carbon and making it more susceptible to nucleophilic attack.
c. Smaller. The CF3 groups are strongly electron-withdrawing, thus decreasing the electrophilicity of the carbonyl carbon and making it less susceptible to nucleophilic attack.
d. Larger. The CF3 groups are bulky and sterically repel each other in hexafluoracetone, thus increasing the electrophilicity of the carbonyl carbon and making it more susceptible to nucleophilic attack.

Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.