Suppose a change (an error, if you like) was made in the procedure of the experiment. We would to know qualitatively, (higher than the correct value, lower than the correct value, or no change) how this change would affect the calculated hydroxide ion concentration. A suggested method for determining and explaining the answer was given in experiment 7 and is repeated here for one such change, with only the final conclusion missing. Fill it in. For the second change, you do the whole analysis. Change 1 – The endpoint was overshot (too much titrant was added). Quantity Measured value (what actually happened) “True” value (what should have happened) (Compared to true value) measured value is Why? Initial burette reading Correct Beginning of titration was ok. Final burette reading 31 mL, say 30 mL, say Too high VNaOH Too high so change in the same direction. Correct Pipetting was ok. Correct Too _________ The numerator is correct; the denominator too high. Change 2 – When pipetting the HCl solution, instead of just touching the tip to the surfaceof the liquid, you forcibly expelled the last bit of solution in the pipette.
Suppose a change (an error, if you like) was made in the procedure of the experiment. We would to know qualitatively, (higher than the correct value, lower than the correct value, or no change) how this change would affect the calculated hydroxide ion concentration. A suggested method for determining and explaining the answer was given in experiment 7 and is repeated here for one such change, with only the final conclusion missing. Fill it in. For the second change, you do the whole analysis. Change 1 – The endpoint was overshot (too much titrant was added). Quantity Measured value (what actually happened) “True” value (what should have happened) (Compared to true value) measured value is Why? Initial burette reading Correct Beginning of titration was ok. Final burette reading 31 mL, say 30 mL, say Too high VNaOH Too high so change in the same direction. Correct Pipetting was ok. Correct Too _________ The numerator is correct; the denominator too high. Change 2 – When pipetting the HCl solution, instead of just touching the tip to the surfaceof the liquid, you forcibly expelled the last bit of solution in the pipette.
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
Problem 102AP
Related questions
Concept explainers
Ionic Equilibrium
Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.
Arrhenius Acid
Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. Keeping it similar to the general acid properties, Arrhenius acid also neutralizes bases and turns litmus paper into red.
Bronsted Lowry Base In Inorganic Chemistry
Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.
Question
Suppose a change (an error, if you like) was made in the procedure of the experiment. We would to know
qualitatively, (higher than the correct value, lower than the correct value, or no change) how this change
would affect the calculated hydroxide ion concentration. A suggested method for determining and
explaining the answer was given in experiment 7 and is repeated here for one such change, with only the
final conclusion missing. Fill it in.
For the second change, you do the whole analysis.
Change 1 – The endpoint was overshot (too much titrant was added).
Quantity
Measured value
(what actually
happened)
“True” value
(what should have
happened)
(Compared to true
value) measured
value is
Why?
Initial burette
reading Correct Beginning of
titration was ok.
Final burette
reading 31 mL, say 30 mL, say Too high
VNaOH Too high
so
change
in the same
direction.
Correct Pipetting was ok.
Correct
Too _________
The
numerator is
correct; the
denominator too
high.
Change 2 – When pipetting the HCl solution, instead of just touching the tip to the surfaceof the liquid,
you forcibly expelled the last bit of solution in the pipette.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Recommended textbooks for you
Principles of Modern Chemistry
Chemistry
ISBN:
9781305079113
Author:
David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:
Cengage Learning
Principles of Modern Chemistry
Chemistry
ISBN:
9781305079113
Author:
David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:
Cengage Learning