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4.1 Acids

4.1 Acids

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Question 178

A student pipetted a sample of potassium hydroxide (KOHKOHKOH) solution into a conical flask and added a few drops of methyl orange indicator.

Dilute hydrochloric acid (HClHClHCl) was slowly added from a burette until the end point was reached.

What colour change would be observed in the conical flask at the end point of the titration?

A

yellow to red

B

red to yellow

C

pink to colourless

D

colourless to pink

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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