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4.1 Acids

4.1 Acids

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Question 52

A student carries out a titration to determine the concentration of a sample of dilute sulfuric acid.

Using a pipette, 25.0 cm325.0\text{ cm}^325.0 cm3 of the dilute sulfuric acid is transferred into a conical flask, and a few drops of phenolphthalein indicator are added. Sodium hydroxide solution is then added slowly from a burette until the acid has just been neutralised.

State the colour change of the phenolphthalein indicator in the conical flask at the end point of this titration.

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Markscheme

4.1 Acids Questions

  1. GCSE
  2. /Chemistry
  3. /4.1 Acids

276 exam-style questions on Edexcel GCSE Chemistry 4.1 Acids, covering 4.1.1 Acids, alkalis and the pH scale, 4.1.2 Hydrogen ion concentration and pH, 4.1.3 Dilute and concentrated, weak and strong acids, 4.1.4 Bases, alkalis and the reactions of acids, 4.1.5 Chemical tests for hydrogen and carbon dioxide, 4.1.6 Neutralisation as a reaction of acids with bases, 4.1.7 Preparing soluble salts, and 4.1.8 Solubility rules and preparing insoluble salts. Each one has a worked solution and a mark scheme showing where the marks go.

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