MP Quiz - pH, Kw and Ka.pptx

State the units for reaction rate.

• mol L⁻¹ s⁻¹ (or M s⁻¹)

• mol s⁻¹

• L mol⁻¹ s⁻¹

• s⁻¹

Label two of the graphs opposite as 1st and 2nd order; (Refer to the two graphs shown: both have Concentration vs Time, one is a curve, one is a straight line).

• Top graph is 1st order, bottom graph is 0 order.

• Top graph is 2nd order, bottom graph is 1st order.

• Top graph is 0 order, bottom graph is 2nd order.

• Top graph is 1st order, bottom graph is 2nd order.

What is the order of the other graph?

• 0 order (for the straight line graph) or 2nd order (if the third is implied, but only two are shown)

• 1st order (for the straight line graph) or 3rd order (if the third is implied)

• 2nd order (for the straight line graph) or 1st order (if the third is implied)

• 3rd order (for the straight line graph) or 0 order (if the third is implied)

What feature does the 1st order graph have that the others do not?

• The half-life is constant for a 1st order reaction.

• The rate increases as concentration decreases.

• The reaction order changes over time.

• The product concentration remains constant.

Sketch Rate vs Concentration graphs for each of these reaction types also.

• 0 order: horizontal line; 1st order: straight line through origin; 2nd order: upward curve from origin.

• 0 order: upward curve from origin; 1st order: horizontal line; 2nd order: straight line through origin.

• 0 order: straight line through origin; 1st order: upward curve from origin; 2nd order: horizontal line.

• 0 order: straight line through origin; 1st order: horizontal line; 2nd order: upward curve from origin.

How do you find the rate constant from a first order Rate vs Concentration graph?

• The rate constant is the gradient (slope) of the Rate vs Concentration graph for a first order reaction.

• The rate constant is the y-intercept of the Rate vs Concentration graph for a first order reaction.

• The rate constant is the area under the Rate vs Concentration graph for a first order reaction.

• The rate constant is the reciprocal of the gradient of the Rate vs Concentration graph for a first order reaction.

For a graph that plots ln k on the y axis, what would you expect to see plotted on the x axis?

• 1/T (the reciprocal of temperature in Kelvin)

• T (temperature in Kelvin)

• ln T (natural log of temperature)

• k (rate constant)

1. Units = ______ [1]

• moldm⁻³s⁻¹

• molL⁻¹s⁻¹

• molcm⁻³s⁻¹

• molm⁻³min⁻¹

Label 1st and 2nd order graphs in the provided diagrams.

• 1st order: middle graph; 2nd order: rightmost graph

• 1st order: leftmost graph; 2nd order: middle graph

• 1st order: rightmost graph; 2nd order: leftmost graph

• 1st order: middle graph; 2nd order: leftmost graph

Order of the other graph (not 1st or 2nd order) in the provided diagrams.

• Zero order

• Third order

• Fourth order

• Fifth order