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Quantitative analysis

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Question 51

An analyst is determining the concentration of a waste lithium hydroxide solution, LiOH\text{LiOH}LiOH, from a battery-recycling process.

During a titration, 25.0 cm3 of this lithium hydroxide solution is neutralised by a 0.125 mol dm-3 solution of phosphoric acid, H3PO4\text{H}_3\text{PO}_4H3​PO4​.

3LiOH+H3PO4→Li3PO4+3H2O 3\text{LiOH} + \text{H}_3\text{PO}_4 \rightarrow \text{Li}_3\text{PO}_4 + 3\text{H}_2\text{O} 3LiOH+H3​PO4​→Li3​PO4​+3H2​O

It is found that 22.40 cm3 of the phosphoric acid solution is required to completely neutralise the 25.0 cm3 of lithium hydroxide solution.

Calculate the concentration of the lithium hydroxide solution in mol dm−3\text{mol dm}^{-3}mol dm−3.

[4]

Quantitative analysis Questions

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

Practise Edexcel GCSE Chemistry Quantitative analysis with exam-style questions for Foundation and Higher tier. 119 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

Question bank