Trial final burette reading (mL) initial burette reading (mL) volume of NaOH(aq) added (mL) colour at endpoint #1 #2 #3 #4 17.935.0 22.9 40.1 0.3 17.9 5.9 22.9 blue green green greer a) Select the most consistent trials and calculate the

Trial final burette reading (mL) initial burette reading (mL) volume of NaOH(aq) added (mL) colour at endpoint #1 #2 #3 #4 17.935.0 22.9 40.1 0.3 17.9 5.9 22.9 blue green green greer a) Select the most consistent trials and calculate the

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter16: Reactions Between Acids And Bases

Section: Chapter Questions

Problem 16.102QE

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Question

The following table shows data from the titration of
four 10.0 mL samples of a solution containing
hydrochloric acid, HCl(aq), using a 0.242 mol/L sodium
hydroxide standard solution. Bromothymol blue is
used as an indicator to detect when the endpoint is
reached.
Titration of 10.0 mL HCl(aq) with 0.242 mol/L
NaOH(aq)
Trial
final burette reading (mL)
initial burette reading (mL)
volume of NaOH(aq) added
(mL)
colour at endpoint
#1 #2 #3 #4
17.935.0 22.9 40.1
0.3 17.9 5.9 22.9
blue green green green
a) Select the most consistent trials and calculate the
average volume of titrant added.
b) Calculate the concentration of the hydrochloric
acid solution.
Hint: Write a balanced chemical reaction first.
You MUST show your work in the space provided.
Then, record your final answers with the correct
number of significant digits and the proper units.

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