Rates of Reactions (OCR A-Level Chemistry A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What graph shape indicates a zero order reaction when rate is plotted against concentration?
What graph shape indicates a zero order reaction when rate is plotted against concentration?
Horizontal straight line
What does a straight line through the origin on a rate-concentration graph indicate?
What does a straight line through the origin on a rate-concentration graph indicate?
First order reaction
If a reaction is second order with respect to A, what happens to the rate when is doubled?
If a reaction is second order with respect to A, what happens to the rate when is doubled?
Rate quadruples
How is the rate constant found from a first order rate-concentration graph?
How is the rate constant found from a first order rate-concentration graph?
From the gradient
How can be found for a second order reaction from rate-concentration data?
How can be found for a second order reaction from rate-concentration data?
Plot rate vs for straight line
On a log-log graph of vs , what does the gradient represent?
On a log-log graph of vs , what does the gradient represent?
Order of reaction
In clock reactions, what is the initial rate proportional to?
In clock reactions, what is the initial rate proportional to?
In an iodine clock reaction, what is the role of sodium thiosulfate?
In an iodine clock reaction, what is the role of sodium thiosulfate?
Reacts with iodine to delay color
For accurate initial rates, what % of reaction should occur during the measured time in clock reactions?
For accurate initial rates, what % of reaction should occur during the measured time in clock reactions?
Less than 15%
How must reaction orders be determined?
How must reaction orders be determined?
Experimentally