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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Please help work this out using the conversion factor!
Transcribed Image Text:P Perusall
Chem101
G A solution of citric acid (H:CeHsC
+
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Question 13 of 21
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A solution of citric acid (H:CSH:O-) with a known concentration of 0.200 M HsCsHsO7
is titrated with a 0.750 M NaOH solution. How many ml of NaOH are required to
reach the third equivalence point with a starting volume of 25.0 mL H:CGHSO,
according to the following balanced chemical equation:
H:C&H:O, + 3 NaOH – NasCeHsO, +
3 H:0
25.0
mL H:C&HSO7
moLNaOH
molH.eHsO,
20.0
mL NAOH
0.200
mo
molHeH50,
molAaOH
LH:CCHSO7
1
1
0.750
0.200 mol H:CH:O,
25.0 mL H:CeH:O,
3 mol NaOH
1 mol H.CcHsO,
20.0 mL NaOH
LH:CcHsO7
1 mol H:CeHsO,
1 mol H:C&HsO,
0.750 mol NaOH
Incorrect, 0 attempts remaining
The correct answer is 20.0 mL NaOH.
Your ratio between mL H:CsH:O; and mol HsCsHsO, in your first conversion factor is
incorrect. Check the problem statement and then try to determine the correct values
for the factor.
Your mole ratio between H:C&HSO; and NaOH in your third conversion factor is
incorrect. Reconsider the number of mol of HsC&HsO, per mol of NaOH. Checking the
coefficients in the given balanced reaction may help you determine the correct mole
ratio
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