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Total questions: 12
Worksheet time: 10mins
Calculate an unknown concentration (Cu) using As = 0.2, Cs = 25, and Au = 0.15
0.75
0.0012
18.75
33.33
Calculate an unknown concentration (Cu) using As = 0.6, Cs = 4, and Au = 0.7
4.67
1.68
3.42
0.105
Calculate the absorbance if the transmittance is 20%
1.70
3.3
1.30
0.70
Match the following regarding Levey-Jennings interpretation:
TREND
6 tests in a row going in one direction
SHIFT
6 tests in a row above or below the mean
OUTLIER
result past the -2s and +2s range
Is this graph in control or out of control?
in control
out of control
Is this graph in control or out of control?
in control
out of control
Is this graph in control or out of control?
in control
out of control
Does the following graph accurately present its data?
Yes
No
Does the following graph accurately present its data?
Yes
No
Using the following graph, determine what the approximate concentration of an unknown is with an absorbance of 0.25
4
7.5
11.5
9
Calculate the absorbance if the transmittance is 89%
0.05
1.95
0.23
3.95
Match the following equations:
%CV
s ÷ x̄ x 100%
Standard Deviation
√[Σ(x-x̄)² ÷ n-1]
Absorbance
2-log%T
Mean
Σx ÷ n
