A 20.00-ml sample contains 2.39 g of KHC, H,O,, known as KHP. This sample is used to standardize an NAOH solution. At the equivalence point, 46.50 mL of NAOH have been added. K.(HC H,O,) = 3.9 × 10-" Indicators that change color within the pH range: bromothymol blue 6.0-7.7 phenolphthalein 8.3- 9.8 alizarin yellow R 10.0 12.0 a. What was the concentration of the NaOH? Concentration - b. What is the pH at the equivalence point? PH c. Which indicator, bromothymol blue, phenolphthalein, or alizarin yellow R, should be used in the titration? bromothymol blue phenolphthalein alizarin yellow R Try Another Verslon 3 item attompts remaining

A 20.00-ml sample contains 2.39 g of KHC, H,O,, known as KHP. This sample is used to standardize an NAOH solution. At the equivalence point, 46.50 mL of NAOH have been added. K.(HC H,O,) = 3.9 × 10-" Indicators that change color within the pH range: bromothymol blue 6.0-7.7 phenolphthalein 8.3- 9.8 alizarin yellow R 10.0 12.0 a. What was the concentration of the NaOH? Concentration - b. What is the pH at the equivalence point? PH c. Which indicator, bromothymol blue, phenolphthalein, or alizarin yellow R, should be used in the titration? bromothymol blue phenolphthalein alizarin yellow R Try Another Verslon 3 item attompts remaining

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

A 20.00-mL sample contains 2.39 g of
KHC, H,O4, known as KHP, This sample is used to standardize an
NaOH solution. At the equivalence point, 46.50 mL of
NAOH have been added.
K. (HC;H4O,-) = 3.9 × 10-
Indicators that change color within the pH range:
bromothymol blue = 6.0 - 7.7
phenolphthalein
= 8.3 -9.8
alizarin yellow R 10.0- 12.0
a. What was the concentration of the NaOH?
Concentration =
M
b. What is the pH at the equivalence point?
pH =
c. Which indicator, bromothymol blue, phenolphthalein, or alizarin yellow R, should be
used in the titration?
bromothymol blue
phenolphthalein
alizarin yellow R
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3 item attempts remalning

(References)
What is the pH at the equivalence point when 56 mL of 0.250 M hydroxylamine is
titrated with 0.160 M HC1?
K, (hydroxylamine) = 1.1 x 10-8
PH =
Submit Answer
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