ANALYTICAL CHEMISTRY FINAL- ACS EXAM QUESTIONS AND ANSWERS A+ GRADED. BUY Quality Materials!
Why are standard solution of reductants used less often than their oxidant counterparts?
not stable in air
The Karl Fischer titration method is used for the determination of...
water
What is the purp...
ANALYTICAL CHEMISTRY FINAL- ACS EXAM QUESTIONS
AND ANSWERS A+ GRADED. BUY Quality Materials!
Why are standard solution of reductants used less often than their oxidant
counterparts?
not stable in air
The Karl Fischer titration method is used for the determination of...
water
What is the purpose of an auxiliary redox agent?
to convert all analyte into one oxidation state
Permanganate aqueous solutions will change concentration over time because
permanganate reacts with...
water
A reducing agent...
gives electrons
The cathode is where...
reduction occurs
In an electrochemical cell, a salt bridge...
maintains electrical neutrality
Standard electrode potentials are
reduction potentials
In a redox titration, an indicator that reacts with a particular reaction product or
reagent is called
specific
In a redox titration, when the redox equilibrium constant increases the endpoint
shape becomes...
sharper
The thermodynamic cell potential is calculated by subtracting the
anode potential from the cathode potential
In an electrochemical cell at equilibrium, the cathode potential is always
the same as the anode potential
In a potentiometry cell, the electrode whose potential is independent of analyte
concentration is called
reference
The metallic indicator electrode whose linear response comes from the direct
equilibrium with the analyte is called
first kind
When a glass pH electrode deviates from typical response because of the low
hydronium ion concentration and presence of other ions its called the
alkaline error
Ion sensitive field effect transistors work by having the analyte change the
potential of which part of the FET?
gate
A photon behaves as a...
wave and particle
, What is the order of colors of visible light from low energy to high energy?
red, orange, yellow, green, blue, indigo, violet
The right frequency of Infrared EMR will cause a molecule to change what?
vibrational energy
Which of the following is not an instrumental deviation of Beer's Law?
high analyte concentration
For chromatographic colums of the same length, what plate height would give the
best efficiency?
0.1
In separation by liquid-liquid extraction, how does the number of extractions
affect the separation efficiency if the total volume is the same?
Several extractions with smaller fractions of the total volume is best
How can the contribution of longitudinal diffusion to chromatographic band
broadening be minimized?
increasing the flow rate of the mobile phase
In liquid-liquid extraction separations, what equilibrium constant is the basis for
the separation?
partition coefficient
electrochemistry
studies relationship between chemical change and electrical work
What does electrochemistry do?
use chemical reactions to manipulate electricity, and synthesizes compounds not
thermodynamically favorable
Reduction and oxidation reactions
chemical reaction where electrons are transferred between reactants
reducing agent
electron donor
oxidizing agent
electron acceptor
half reaction
a balanced chemical equation that describes either the oxidation or reduction
charge
(q)
electric potential
E, work to move charge
current
I, charge flow per second
Free energy
delta G, reaction spontaneity at constant temperature and pressure
electrochemical cell
reactants do not come in direct contact with one another
Cathode
electrode where reduction occurs
Anode
electrode where oxidation occurs
salt bridge
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