CHEM 1124Q Lecture Notes - Lecture 12: Nitride, Intravenous Sodium Bicarbonate, Dry Ice
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26 Mar 2018
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What is the pH of a solution made by dissolving 4.3 g of K2CO3 and 1.6 g of KHCO3 in 500. mL of water? (See the appendix.)
Table 3 An Acid-base table | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Table 15.5:
Name od Acid | Formula | Ka | Conjugate Base | Kb |
Carbonic acid | H2CO3 | 4.2x10-7 | HCO3- | 2.4x10-8 |
Hydrogen Carbonic Acid | HCO3- | 4.8x10-11 | CO32- | 2.1x10-4 |
Sulfuric Acid | H2SO4 | very large | HSO4- | very small |
Hydrogen Sulfate Ion | HSO4- | 1.3x10-2 | SO42- | 7.7x10-13 |
Phosphoric Acid | H3PO4 | 7.5x10-3 | H2PO4- | 1.3x10-12 |
Dihydrogen Phosphate ion | H2PO4- | 6.2x10-8 | HPO42- | 1.6x10-7 |
Hydrogen Phosphate Ion | HPO42- | 4.8x10-13 | PO43- | 2.1x10-2 |
1. See table 15.5 for acid dissociation constants. What are the concentrations of H+ and CO32- respectively for a 0.073 M carbonic acid solution? Assume there is no loss of any carbonate species via generation of CO2
2,See table 15.5 for acid dissociation constants. What are the concentrations for H+ and SO42- respectively for a 0.15 M sulfuric acid solution?
3.See table 15.5 for acid dissociation constants. What are the concentrations of H+ and PO43- respectively for a 0.15 M phosphoric acid solution?