w336 Titrations Worksheet PDF
w336 Titrations Worksheet PDF
w336 Titrations Worksheet PDF
2) You are titrating an acid into a base to determine the concentration of the base. The
endpoint of the neutralization is reached but the stopcock on the buret sticks slightly
and allows a few more drops of acid to fall into the solution. How will this affect your
calculations for the concentration of the base?
4) A few small drops of water are left in a buret that is then used to titrate a base into an
acid solution to determine the concentration of the acid. Will this small amount of water
have any effect on the determined value for the concentration of the acid? If so, how is
it affected?
5) It takes 12.5 mL of a 0.30 M HCl solution to neutralize 285 mL of NaOH solution. What
is the concentration of the NaOH solution?
6) Lulu Labwrecker carefully pipets 25.0 mL of 0.525 M NaOH into a test tube. She places
the test tube into a small beaker to keep it from spilling and then pipets 75.0 mL of
0.355 M HCl into another test tube. When Lulu reaches to put this test tube of acid into
the beaker along with test tube of base she accidentally knocks the test tubes together
hard enough to break them and their respective contents combine in the bottom of the
beaker. Is the solution formed from the contents of the two test tubes acidic or basic?
What is the pH of the resulting solution?
2) Those extra few drops of acid will cause the calculation for the concentration
of the base to be too high. This is because it will seem that it took more acid
to neutralize the base than it really did and so it will appear that the base is
of stronger concentration than it really was.
4) Yes, even this small amount of water will cause an error because the drops of
water add to the volume of base, actually diluting it slightly. This means it
will take a tad more base solution to neutralize the acid, making it seem as if
the acidic solution was of stronger concentration than it actually was.