a. What is the pH of 0.25 mol dm 3 HCl(aq)? b. What is the pH of
Question:
a. What is the pH of 0.25 mol dm–3HCl(aq)?
b. What is the pH of 0.0500 mol dm–3 sodium hydroxide? (Kw = 1.00 × 10–14 mol2 dm–6)
c. The graph shows how the pH changes when 0.100 mol dm–3 ethanoic acid is titrated with 0.100 mol dm–3 sodium hydroxide.
i. Explain why methyl orange (pKa = 3.7) is not a suitable indicator to use for this titration.
ii. Would phenolphthalein be a suitable indicator to use for this titration? Explain your answer.
d. Propanoic acid is a weak acid. A 0.0500 mol dm–3 solution of propanoic acid has a pH of 3.1. Calculate the value of Ka for propanoic acid. Show all your working.
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a The pH of a 025 mol dm3 HClaq solution is less than 7 which indicates that it is an acidic solutio...View the full answer
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Related Book For 
Cambridge International AS And A Level Chemistry Coursebook
ISBN: 9781316637739
2nd Edition
Authors: Lawrie Ryan, Roger Norris
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