Exam 1
Explain accuracy and precision
Accuracy: how close the measured value is to the true value
Precision: how similar the measured values are to one another
⇌
What do the arrows represent?
Equilibrium
What causes the change in direction of a wave when it enters a medium where its speed is different.
refraction
Does oxidation go with the anode or cathode?
Anode
In this lab, you dissolved a penny
Copper
This type of error involves instrument/equipment error
systematic
How are activity coefficients and ionic strength related?
Inversely
This detector is very sensitive
Photomultiplier tube
State the electrode used to calculate standard potentials.
S.H.E.
In this lab, we discovered a bottle contained no SO2.
Wine Analysis
what is the equation for parts per million?
mass of solute/total mass x 10^6
NaOH is a primary standard. True or False
False
State a difference between single-beam and double-beam.
Rotating mirrors, 2 holders (ref and sample)
How does one know Ecell is non-spontaneous?
<0
Calculate the mean: 5.8, 8.9, 7.6, 3.4, 2.5
5.6
determine if means of two sets of measurements are statistically different
What is the equivalence point?
the point at which the added titrant is chemically equivalent completely to the analyte in the sample.
This is the most common monochromator used.
Diffraction grating
This electrode contains Hg.
Calomel
How many times are suppose to perform an experiment?
3x
Comparison of standard deviations
F-test
When solving for K are all states of matter included? If no, which states are not included?
Liquid and solid
What is the value for speed of light?
3.00x10^8 m/s
Name an instrument classified as a potentiometry for electroanalytical methods.
pH meter
What does (n) stand for in equations? (concerning analytical chem)
Number of observations