Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter21: The Chemistry Of The Main Group Elements
Section21.5: The Alkaline Earth Elements, Group 2a
Problem 1Q
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1.)Calculate the pH of a bicarbonate/carbonate buffer in which the concentration of sodium bicarbonate (NaHCO3) is always 0.34 M, but the concentration of sodium carbonate (Na2CO3)corresponds to the following values: 0.53 M. (Ka for HCO3− is 5.6 ×10−11.)
Report your answer to four significant figures. |
2.)Calculate the pH of a bicarbonate/carbonate buffer in which the concentration of sodium bicarbonate (NaHCO3)is always 0.30 M, but the concentration of sodium carbonate (Na2CO3) corresponds the following value: 0.23 M.
(Ka for HCO3− is 5.6 × 10−11.) Report your answer to three significant figures. |
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