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3.4 Using concentrations of solutions in mol/dm3

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Question 8

An analyst placed 25.0 cm3 of phosphoric acid in a flask. Complete neutralisation required 30.0 cm3 of 0.150 mol/dm3 sodium hydroxide solution. The equation for the reaction is 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. What is the concentration of the phosphoric acid solution?

[1]
A

0.00150 mol/dm30.00150\ \text{mol/dm}^30.00150 mol/dm3

B

0.0273 mol/dm30.0273\ \text{mol/dm}^30.0273 mol/dm3

C

0.0600 mol/dm30.0600\ \text{mol/dm}^30.0600 mol/dm3

D

0.0500 mol/dm30.0500\ \text{mol/dm}^30.0500 mol/dm3

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3.4 Using concentrations of solutions in mol/dm3 Questions

  1. GCSE
  2. /Chemistry
  3. /3.4 Using concentrations of solutions in mol/dm3

106 exam-style questions on AQA GCSE Chemistry 3.4 Using concentrations of solutions in mol/dm3, covering 3.4.1 Concentration in mol/dm3. Each one has a worked solution and a mark scheme showing where the marks go.

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