Quick questions on Concentration changes over time - AP Chemistry Unit 5

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?

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A first-order reaction has

t_{1/2} = 40.

s. Calculate the rate constant. [2 points]

What is q2?

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A plot of

[\text{A}]

versus time is a straight line with slope

-2.0 \times 10^{-3}\ \text{M s}^{-1}

. State the order and the value of

k

. [2 points]

What is sign of the slope?

Show answer

Zero- and first-order plots have negative slopes; the second-order reciprocal plot has a positive slope.

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