The following table shows data from the titration of four 10.0 mL samples of a solution containing hydrochloric acid, HCI(aq), using a 0.231 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 0.231 mol/L NaOH(aq) Trial #1 # 2 #3 # 4 final burette reading (mL) 17.9 35.0 22.9 40.1 initial burette reading (mL) 0.3 17.9 5.9 22.9 volume of NaOH(aq) added (mL) colour at endpoint 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.

The following table shows data from the titration of four 10.0 mL samples of a solution containing hydrochloric acid, HCI(aq), using a 0.231 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 0.231 mol/L NaOH(aq) Trial #1 # 2 #3 # 4 final burette reading (mL) 17.9 35.0 22.9 40.1 initial burette reading (mL) 0.3 17.9 5.9 22.9 volume of NaOH(aq) added (mL) colour at endpoint 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.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

Question

The following table shows data from the titration of four 10.0 mL samples of a solution containing hydrochloric acid, HClag),
using a 0.231 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 0.231 mol/L NaOH(aq)
Trial
#1
#2
#3
# 4
final burette reading (mL)
17.9
35.0
22.9
40.1
initial burette reading (mL)
0.3
17.9
5.9
22.9
volume of NaOH(aq) added (mL)
colour at endpoint
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.
B I
E E
of
U S x2 x²
田I
</> X
!

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