What else can we use to keep the complete half cell reaction neutral? -
ANSWERS-a semi-permeable membrane
What is one problem with the semi-permeable membranes? - ANSWERS-it cannot
be made to be 0% permeable to other cations or anions
A good semi-permeable membrane will have what type of K? - ANSWERS-the K
value will be very very small
What type of agent is used more in redox titrations as a titrant? - ANSWERS-an
oxidizing agent
What is the problem with using permanganate as a titrant in redox titrations? -
ANSWERS-it is not a primary standard
When doing a redox titration, are you able to find a point at 0 mL? - ANSWERS-no,
you cannot find a point because you don't truly know the [metal]
Doing a redox titration: - ANSWERS-1. Find the K value using the equation to find
K with half-cells
2. Find the equivalence point(same as with acid base titrations)
3. solve the ice tables (WATCH OUT FOR STOICHIOMETRY)
,4. Solve for E+ using the concentrations you got
5. Find Ecell by taking the E+ you found- E- of the reference electrode
chelate effect - ANSWERS-the ability of multidentate ligands to form more stable
metal complexes than those formed by similar monodentate ligands
masking agent - ANSWERS-a reagent that protects some component of the
analyte from reaction with the EDTA
common ion effect - ANSWERS-a salt will be less soluble if one of its constituent
ions is already present in the solution
Gravimetric factor - ANSWERS-(grams of substance in analyte)/(grams of product
formed)
what is an extraction? - ANSWERS-combine two immiscible phases (polar, non-
polar), agitate, and let the analyte partition
what is chromatography? - ANSWERS-combine two immiscible phases (polar, non-
polar), let analyte partition
what is the difference between an extraction and chromatography? - ANSWERS-
one of the phases is flowing in chromatography while the other phase is
stationary
, what is the principle of extraction? - ANSWERS-like dissolves like
Ka equation for chromatography - ANSWERS-[A]stationary phase/[A]moblie phase
In chromatography you want to have Ka and Kb - ANSWERS-not equal to each
other
Retention Factor Equation - ANSWERS-k=(tR-tM)/tM
tR is the distance between the peaks
tM is the distance from 0 to the first peak
Relative Retention - ANSWERS-alpha=k2/k1 or alpha=t'2/t'1
Liquid Chromatography - ANSWERS-used for samples that are not volatile, like
dissolves like
Normal Phase in Liquid Chromatography - ANSWERS-a more polar stationary
phase and less polar mobile phase and is not used as often
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Teacher101. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.