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Published byJovani Linnell Modified over 3 years ago
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Beginning – pH rises gradually as base added, pH remains relatively constant event though small amounts of base are being added – first amount of titrants are immediately consumed, leaving excess of strong acid 2
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After this flat region, there is a very rapid increase in pH for a very small additional volume of titrant. The MIDPOINT of the sharp increase in pH occurs at a pH of 7.00 – the equivalence point of the reaction and corresponds to the endpoint of titration (with an appropriate indicator) – the neutralization point 3
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Finally, the curve bends to reflect a more gradual increase in pH as excess base is added 4
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In a titration, 20.0 mL of 0.300 mol/L HCl(aq) is titrated with standardized 0.300 mol/L NaOH(aq). What is the amount of unreacted HCl(aq) and the pH of the solution after the following volumes of NaOH(aq) have been added? (a) 0 mL(b) 10.0 mL (c) 20.0 mL(d) 21.0 mL 5
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