ANALYTICAL CHEMISTRY FINAL - ACS EXAM

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ANALYTICAL CHEMISTRY FINAL - ACS EXAM

CORRECT SOLUTIONS.

ppm - correct answer- (grams analyte/grams sample)x10^6

Molarity - correct answer- moles analyte/liter of solution

Volume Percent - correct answer- (volume solute/volume soution)x100

Volume ppm - correct answer- (volume solute/volume solution)x10^6

kilo- - correct answer- 10^3

deci- - correct answer- 10^-1

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centi- - correct answer- 10^-2

milli- - correct answer- 10^-3

micro- - correct answer- 10^-6

nano- - correct answer- 10^-9

pico- - correct answer- 10^-12

femto- - correct answer- 10^-15

weight percent - correct answer- (grams analyte/grams sample)x100

ppt - correct answer- (grams analyte/grams sample)x10^3

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ppt simplified - correct answer- gram analyte/liter solution

ppm simplified - correct answer- mg analyte/liter solution

ppb simplified - correct answer- micrograms analyte/liter solution

pptr simplified - correct answer- nanograms analyte/liter solution

buoyancy correction - correct answer- m=(m'(1-(air density/weight density)))/(1-(air density/object density))

accuracy - correct answer- closeness of the mean to the "true value"

precision - correct answer- reproducibility of individual measurements

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Uncertainty in Addition/Subraction - correct answer- e=sqrt(ex1^2+ex2^2+ex3^2+...)

Uncertainty in Multiplication/Division - correct answer- e=y*sqrt((ex1/x1)^2+(ex2/x2)^2+(ex3/x3)^2+...)

Significant Figures in Logarithms and antilogarithms - correct answer- the number of significant figures in the log should equal the number of digits in the mantissa

How many significant figures in log(205.5) - correct answer- four significant figures, so you will need four decimal places in your answer

pH - correct answer- -log[H3O+]

[H3O+] - correct answer- 10^-pH

Absorbance - correct answer- -log(transmittance)

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