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2 cards from this section. Quick, good the night before a test.
Explain what a polyprotic acid is.
Think of acids that have multiple H+ ions to donate.
How many equivalence points does a diprotic acid have?
Consider how many protons are ionizable.
How many equivalence points does a triprotic acid have?
Consider how many protons the acid can donate.
True or False: The pH at the equivalence point of a strong acid-weak base titration is always greater than 7.
Think about the nature of the solutions involved.
In a titration of phosphoric acid (H3PO4, a triprotic acid) with NaOH, sketch a titration curve and label the equivalence points. How does the curve change with strong vs weak bases?
Remember to account for where buffer regions stabilize the pH in between each rise.
Given a diprotic acid with Ka1 = 0.01 and Ka2 = 0.0001, calculate the pH at the first equivalence point after titration with a strong base.
Focus on the concentration of H+ produced and relate it through the Ka1 value.
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