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6.2 Quantitative analysis

6.2 Quantitative analysis

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Question 37

A student carried out a titration to find the exact concentration of a calcium hydroxide (limewater) solution by neutralizing it with standard hydrochloric acid.

The steps of the titration method are shown below, but they are not in the correct order.

  • step A: transfer the measured calcium hydroxide solution into a clean conical flask and add a few drops of methyl orange indicator
  • step B: record the final reading on the burette and calculate the volume of standard hydrochloric acid added
  • step C: use a volumetric pipette to measure 25.0 cm3 of the calcium hydroxide solution
  • step D: fill a burette with the standard hydrochloric acid and record the initial reading
  • step E: run the standard hydrochloric acid from the burette into the conical flask, swirling continuously, until the indicator changes colour

Write the steps in the correct order by filling in the empty spaces in the table below. Some of the steps have been completed for you.

First stepLast step
DB
[1]
Markscheme

6.2 Quantitative analysis Questions

  1. GCSE
  2. /Chemistry
  3. /6.2 Quantitative analysis

157 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.

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