Acids and Bases
Which intermolecular force is predominant in a solution where water (H2O) dissolves ammonia (NH3)?
Dipole-dipole interactions
London dispersion forces
Hydrogen bonding
Ion-dipole interactions
Incorporating high charges polyatomic ions into salts used for creating standard solutions could have what kind of complex side-effects impacting an endpoint determination during precipitation titrations?
Highly charged ions might associate with indicators disrupting their color-change properties at endpoints.
Such inclusion primarily alters conductometric detection precision rather than visual endpoint determinants.
These ions create secondary equilibria which obscure primary reaction completeness signals at endpoints.
The presence can lead to lattice energy effects that complicate solubility calculations and disrupt endpoint clarity.
Consider the titration of 30.0 mL of 0.20 M HNO2 by adding 0.05 M NaOH to it. Which of the following is true about the pH at the equivalence point?
It is less than 7
It is equal to 7
It is greater than 7
It is impossible to predict
In an acid-base titration, which substance would you expect to find in the burette initially?
Buffer solution
Distilled water
Titrand (either acid or base)
Indicator solution
During an acid-base titration, what is indicated by the color change in an indicator?
Precipitation has occurred in the solution.
The endpoint has been reached.
The temperature of the solution has changed.
The solutions are mixed thoroughly.
What color does litmus paper turn when it reacts with an acid?
Yellow
Green
Red
Blue
During a strong acid-strong base titration, at what point in the titration does pH experience its most rapid change?
At initial addition when first drops of titrant are added to analyte.
At equivalence point when equal moles of acid and base have reacted.
At halfway to equivalence point where half moles of acid have been neutralized.
After equivalence point once all reactant has been consumed and excess begins to accumulate.

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At the half equiv. point, which of the following is false?
pH=pKa
[A-]=[OH-]
pOH=pKb
The color change from an indicator occurs.
During a titration, which piece of equipment accurately measures the volume of titrant added to the analyte?
Beaker
Erlenmeyer flask
Burette
Test tube
Which piece of laboratory equipment would provide the most precise delivery of titrant during an acid-base titration?
Volumetric pipette
Graduated cylinder
Beaker
Burette