Quiz 4.4 – Rate of Reaction (Part 3)

Which of the following best describes how to find the instantaneous rate of a reaction at a specific time on a concentration vs. time graph?

What does a steeper slope on a concentration vs. time graph indicate about the rate of reaction?

On a graph of concentration (mol/L) vs. time (s), a tangent drawn at 40 seconds intersects at 0.50 mol/L and drops to 0.30 mol/L in the next 10 seconds. What is the instantaneous rate at 40 s?

When plotting the concentration of a reactant vs. time, how can you identify the point of maximum rate?

A student draws a tangent at 10 s on a concentration vs. time graph. The slope is –0.05 mol/L·s. What does the negative sign indicate?

If the instantaneous rate at time 20 s is zero, what does this mean?

On a product concentration vs. time graph, how would you estimate the instantaneous rate at 15 s?

A graph of product concentration (mol/L) vs. time (s) shows a curve becoming flatter as time increases. What does this suggest about the instantaneous rate?

On a graph showing the decomposition of a reactant, a student draws a tangent at 5 s and finds a slope of –0.10 mol/L·s. What is the instantaneous rate of reaction?

If a tangent drawn to a curve has a slope of zero, what does this indicate about the reaction at that instant?