A laboratory has a bottle of sodium hydroxide solution, Q. The concentration label is missing.
A student transfers 20.0 cm3\mathrm{cm^{3}}cm3 of 0.160 mol/dm3\mathrm{mol/dm^{3}}mol/dm3 sulfuric acid into a conical flask. The student adds solution Q from a burette until the end point is reached.
The mean volume of solution Q added is 32.00 cm3\mathrm{cm^{3}}cm3.
H2SO4(aq)+2NaOH(aq)→Na2SO4(aq)+2H2O(l) \mathrm{H_{2}SO_{4}(aq)} + 2\mathrm{NaOH(aq)} \rightarrow \mathrm{Na_{2}SO_{4}(aq)} + 2\mathrm{H_{2}O(l)} H2SO4(aq)+2NaOH(aq)→Na2SO4(aq)+2H2O(l)The replacement label must show the concentration of solution Q in mol/dm3\mathrm{mol/dm^{3}}mol/dm3.
Calculate the value for the replacement label.
Concentration of solution Q = .................... mol/dm3\mathrm{mol/dm^{3}}mol/dm3
152 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.