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The diagram below represents the titration curve for the reaction between a particular acid and a particular base - VCE - SSCE Chemistry - Question 6 - 2014 - Paper 1
Question 6
The diagram below represents the titration curve for the reaction between a particular acid and a particular base. The equation that best represents the reaction de... show full transcript
Worked Solution & Example Answer:The diagram below represents the titration curve for the reaction between a particular acid and a particular base - VCE - SSCE Chemistry - Question 6 - 2014 - Paper 1
Step 1
Identify the titration reaction represented by the curve
Answer
To determine the correct reaction that corresponds to the titration curve, we need to look for the neutralization between an acid and a base that results in a significant change in pH, typically indicated by a rapid rise in the curve.
The titration of a weak acid with a strong base (like CH3COOH with NaOH) would show a noticeable pH change beyond the equivalence point. Thus, we can analyze the options provided for their likely reactions.
Step 2
Determine which equation is valid
Answer
Among the equations provided, the most relevant one that corresponds with the behavior seen in the curve is:
3. CH3COOH(aq) + NaOH(aq) → CH3COONa(aq) + H2O(l)
This equation demonstrates a weak acid (acetic acid) reacting with a strong base (sodium hydroxide), leading to a significant change in the pH at the equivalence point, which aligns with the expected characteristics from the titration curve.