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NYU Gen Chem 2 Pre-Lab Quiz 9 Questions and Answers 100% Solved
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NYU Gen Chem 2 Pre-Lab Quiz 9
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NYU Gen Chem 2 Pre-Lab Quiz 9Cuvets should be dried with a Kimwipe before placing it in the chamber of the
spectrophotometer and closing the lid: - answer TRUE
The main components of a SpectroVis® Plus Spectrophotometer are - answera
tungsten bulb
a diffraction grating
a linear CCD array detector
What is a fume hood? - answer Laboratory devices that allow us to experiment with
volatile or noxious chemicals while isolating their vapors from the laboratory.
The deprotonated form of bromothymol blue (BB-) absorbs light - answerin the orange
region (maximum at 616 nm) and appears blue
Which of the following statements is/are correct? - answerK is unitless because the
pressures or molarities in the equilibrium constant expression are unitless activities.
You do not know where to properly discard something. What should you do? -
answerAsk your instructor so that it gets disposed of properly.
Uh oh! You accidently knocked over an empty beaker, and it's shattered. What should
you do? - answerInform an instructor immediately, who will sweep up the glass shards
and dispose of them in a thick-walled carton container.
What is the pKa for an acid if Ka = 8.5 x 10^-6? - answer5.07
A small amount of chemical has spilled on your skin. What do you do? - answerBoth c
and d.
(Wash off affected area with cold water for at least 15 minutes.
Immediately notify your lab instructor.)
What is the equilibrium constant expression for this reaction?
PbO(s) + CO(g) <--> Pb(l) + CO2(g) - answerK = PCO2 / PCO
What is the hydronium ion concentration in a solution that has a pH of 7.34? -
answer4.6x10^-8 M
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