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Unformatted text preview: HCl acid, and NaOH base are unstable. HCl (aq) vapourize in room temperature, therefore concentration decreases in time. NaOH (aq) is hygroscopic = gains mass by absorbing water moisture from air. primary standard however, are chemicals in pure and stable form for which accurate concentration can be prepared. For Example, potassium hydrogen phthalate, KHC 7 H 4 O 4 acid sodium carbonate, Na 2 CO 3 base Equivalence point vs. End point Titration 3 cases a) strong acid vs. strong base b) weak acid vs. strong base c) strong acid vs. weak base...
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This note was uploaded on 05/31/2011 for the course CHEM 4U taught by Professor Jargin during the Spring '11 term at York University.
- Spring '11