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6.2 Quantitative analysis

6.2 Quantitative analysis

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Question 46

In a titration, 15.00 cm3 of dilute phosphoric acid reacted with 28.40 cm3 of 0.220 mol dm-3 sodium hydroxide solution, NaOH\text{NaOH}NaOH.

H3PO4+3NaOH→Na3PO4+3H2O \text{H}_3\text{PO}_4 + 3\text{NaOH} \rightarrow \text{Na}_3\text{PO}_4 + 3\text{H}_2\text{O} H3​PO4​+3NaOH→Na3​PO4​+3H2​O

Calculate the concentration of the dilute phosphoric acid, H3PO4\text{H}_3\text{PO}_4H3​PO4​, in mol dm−3\text{mol dm}^{-3}mol dm−3. Give your answer to 3 significant figures.

[4]
Markscheme

6.2 Quantitative analysis Questions

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

119 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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