Rate & Differential Rate Equation

When [B] is decreasing at 0.5 molL-1s-1, how fast is [A] decreasing for A +2B --->C

• 0.5

• 0.25

• 1.0

• 1.25

Find the average rate over the entire experiment.

Time(s) [A](mol/L)

0.0 0.0500

2.0 0.0448

6.0 0.0300

8.0 0.0249

10.0 0.0209

20.0 0.0088

• -2.06 x 10>-3 molL-1s-1

• 0.0198 molL-1s-1

• 2.06 x10>-3 molL-1s-1

• 0.0500 molL-1s-1

What is instantaneous rate at time t?

• Concentration at time t of curve conc vs time

• Slope of tangent at time t=0 of curve conc vs time

• Change in reactant concentration over a change in time

• Slope of tangent at time t of curve conc vs time

When [O2] is decreasing at 0.23 molL-1min-1,what rate is [H2O] increasing for

2H2 + O2 --> 2H2O?

• 0.46 molL-1min-1

• 0.115 molL-1min-1

• 0.23 molL-1min-1

• - 0.23 molL-1min-1

When [C] is increasing at 2 molL-1s-1, how fast is [A] decreasing for

2A --> B + C?

• 2 molL-1s-1

• -2 molL-1s-1

• 4 molL-1s-1

• -4 molL-1s-1

What is average rate ?

• Concentration at time t of curve conc vs time

• Slope of tangent at time t=0 of curve conc vs time

• Change in reactant concentration over a change in time

• Slope of tangent at time t of curve conc vs time

What is average rate ?

• Concentration at time t of curve conc vs time

• Slope of tangent at time t=0 of curve conc vs time

• Change in reactant concentration over a change in time

• Slope of tangent at time t of curve conc vs time

What is initial rate ?

• Concentration at time t of curve conc vs time

• Slope of tangent at time t=0 of curve conc vs time

• Change in reactant concentration over a change in time

• Slope of tangent at time t of curve conc vs time

Which of the following is a unit of rate of reaction?

• s-1

• Ms-1

• M

• M-1s-1

Define rate of reaction

• A measure of how fast a reactant is consume at time,t =0

• A measure of how fast a reactant is consumed at a certain time interval

• A measure of how fast a product is formed from t= 0 to t= 60

• A measure of the tangent of a curve at a time interval