. A mouthwash solution at 298.15 K contains NaH₂PO4 at a concentration of 5% by weight, i.e. 5 g in 100 ml solution. Calculate this concentration in mol dm-³ show all your workings.
. A mouthwash solution at 298.15 K contains NaH₂PO4 at a concentration of 5% by weight, i.e. 5 g in 100 ml solution. Calculate this concentration in mol dm-³ show all your workings.
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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Transcribed Image Text:ii. A mouthwash solution at 298.15 K contains NaH₂PO4 at a concentration of 5%
by weight, i.e. 5 g in 100 ml solution.
3
Calculate this concentration in mol dm show all your workings.
iii. Calculate using the Henderson Hasselbalch equation the concentration of
Na₂HPO4 needed to be in the solution in part iii to yield a buffer with pH 7.0?
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