THIS IS A PRELAB QZ How will you determine the correct wavelength to use for abs
ID: 818163 • Letter: T
Question
THIS IS A PRELAB QZ
How will you determine the correct wavelength to use for absorbance vs. time data collection? Graph absorbance vs. wavelength Graph absorbance vs. concentration O Graph concentration vs. time O Graph concentration vs. wavelength. use to make absorbance measurements? Which wavelength of light should you most by the solution least by the solution Violet (around 420 nm) The wavelength that is absorbed the O The wavelength that is absorbed the O Ultraviolet light The Beer-Lambert law tells us that concentration and absorbance are: Q Proportionally related (as one increases, the other increases)Inversely related (as one increases, the other decreases)What volume of 2.50 x 10"4 M CV+ solution should be diluted to 10.0 mL to prepare a 7.50 x 10-5 M CV+ solution 100 mL 3.00 mL 5.00 mL 7.50 mL 33.3 mL The rate law for the decomposition of N205 is: Rate = k[N205]. Which of the following graphs should be linear? Rate vs. [N205]log (1/[N205]) vs. time O [N205] vs. time O ln[N205] vs. time O 1/[N205] vs. time The rate law for a reaction is: Rate = k[A][B]2. Which of the following will cause the value of the rate constant, k, to change? Changing the initial concentration of A or B Changing the reaction temperature O Changing the concentration or the temperature O Nothing will change the value of k because it is a constantExplanation / Answer
1). graph of absorbance versus wavelength....
2). the ultraviolet light should be used to make absorbance measurements...
3). proportionally related...
4). 3ml...
5). log(1/[N2O5) versus time...
6). nothing will change the rate constant.... because it is a constant....
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