Three pre-lab questions that I need help understanding.

Three pre-lab questions that I need help understanding.


the plt
increase or decrease? The addition of HCl wald mat
make
the solution more acidic, and th
word decrease.
2. How does an end point differ from an equivalence point?
The equivalence point in a titration is the
point at which the added tifrant is
chemically equivalent completely to the
analyre in the sampu-End point is the
coloro
point where the indicater changes it’s
3. Aliquots of an unknown tris sample were titrated with a standard HCl solution:
mol
mol
Senec
a. Use the balanced equation to set up the string calculation showing how the tris
concentration will be calculated. Use of acid, L of acid, of base, and L of
base to represent the reactants. Remember the calculation must include a
stoichiometric ratio.
L
L
b. A 20.00 mL aliquot of tris was titrated with 0.1009 M HCl. The sample required
20.67 mL HCl to reach a BCG endpoint. What is the molarity of the tris solution?
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inaccurate rest-results that due to
having
to such
march than the actual amount.
5. A tris sample was titrated with 0.09857 M HCl solution. The initial buret reading was
1.84 mL and the final buret reading was 37.86 mL. A student recorded the initial volume
as 1.8 mL and the final volume as 37.9 mL. State two ways this error will change the
reported molarity of the tris.
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