CHM 145 Experiment 7 Questions With Complete Solutions
(std. dev. / mean) x 100% Correct Answers % RSD = ?
| known value - mean | > t-score x (std. dev. / sqrt. n) Correct
Answers t-test = ?
1 mg/L (this means, volume of stock solution (mL) = final
concentration (mg/L)) Correct Answers M1: concentration of
stock solution (KNO3) = 100 mg/L
V1: volume = 1 mL
M2: ?
V2: 100 mL
1-10 Correct Answers To find NA and NB, you need to make a
calibration curve in the range of ______-______ mg/L N (you
will need to dilute your stock solution to complete this)
1, stock, 100 Correct Answers You will also need to prepare
_______________ liter of _______________ solution in which
the concentration of Nitrate is _______________mg/L
7.22 x 10^-3 Correct Answers 1 mg/L of N = _________ g
KNO3/L
10 mg/L Correct Answers nitrate levels in natural waters rarely
exceed _________
100 Correct Answers add 2mL of ISA solution to each
________mL of the environmental sample
, accuracy Correct Answers comparison of the determined
values (triplicate measurements) with the actual known
concentrations of NA and NB gives an indication of the
______________ of the method
accuracy Correct Answers how close a measurement is to the
true value
accuracy, position Correct Answers Comparison of your NA
and NB values to the actual NA and NB values will give you an
idea of the _______________ of your method, while running
each sample three times (in triplicate) will give you an idea of
the _______________ of your method
ammonia Correct Answers NH3
ammonium Correct Answers NH4+
before Correct Answers The stock solution must be acidified
with H2SO4 so that it is stable for the whole experiment.
H2SO4 must be added _______________ the volume of the
stock solution is brought to the 1 L mark on the volumetric flask
chlorine Correct Answers ____________ is added to water to
kill bacteria in municipal water supplies
detergent, HCl Correct Answers Glassware needs to be
thoroughly cleaned for accurate measurements in this
experiment. The cleaning procedure includes: wash each piece
with _______________, rinse each with tap water (3-4 times),
(std. dev. / mean) x 100% Correct Answers % RSD = ?
| known value - mean | > t-score x (std. dev. / sqrt. n) Correct
Answers t-test = ?
1 mg/L (this means, volume of stock solution (mL) = final
concentration (mg/L)) Correct Answers M1: concentration of
stock solution (KNO3) = 100 mg/L
V1: volume = 1 mL
M2: ?
V2: 100 mL
1-10 Correct Answers To find NA and NB, you need to make a
calibration curve in the range of ______-______ mg/L N (you
will need to dilute your stock solution to complete this)
1, stock, 100 Correct Answers You will also need to prepare
_______________ liter of _______________ solution in which
the concentration of Nitrate is _______________mg/L
7.22 x 10^-3 Correct Answers 1 mg/L of N = _________ g
KNO3/L
10 mg/L Correct Answers nitrate levels in natural waters rarely
exceed _________
100 Correct Answers add 2mL of ISA solution to each
________mL of the environmental sample
, accuracy Correct Answers comparison of the determined
values (triplicate measurements) with the actual known
concentrations of NA and NB gives an indication of the
______________ of the method
accuracy Correct Answers how close a measurement is to the
true value
accuracy, position Correct Answers Comparison of your NA
and NB values to the actual NA and NB values will give you an
idea of the _______________ of your method, while running
each sample three times (in triplicate) will give you an idea of
the _______________ of your method
ammonia Correct Answers NH3
ammonium Correct Answers NH4+
before Correct Answers The stock solution must be acidified
with H2SO4 so that it is stable for the whole experiment.
H2SO4 must be added _______________ the volume of the
stock solution is brought to the 1 L mark on the volumetric flask
chlorine Correct Answers ____________ is added to water to
kill bacteria in municipal water supplies
detergent, HCl Correct Answers Glassware needs to be
thoroughly cleaned for accurate measurements in this
experiment. The cleaning procedure includes: wash each piece
with _______________, rinse each with tap water (3-4 times),
