In a redox titration used to monitor the decomposition of hydrogen peroxide, a student uses a standard solution of potassium manganate(VII), KMnO4\text{KMnO}_4KMnO4, with a concentration of 0.150 mol/dm3.
What is the concentration of this solution in g/dm3\text{g/dm}^3g/dm3?
(The relative atomic masses, ArA_{\text{r}}Ar, are: O=16.0\text{O} = 16.0O=16.0, K=39.1\text{K} = 39.1K=39.1, Mn=54.9\text{Mn} = 54.9Mn=54.9)
23.7 g/dm323.7\text{ g/dm}^323.7 g/dm3
14.1 g/dm314.1\text{ g/dm}^314.1 g/dm3
16.5 g/dm316.5\text{ g/dm}^316.5 g/dm3
9.49×10−4 g/dm39.49 \times 10^{-4}\text{ g/dm}^39.49×10−4 g/dm3
91 exam-style questions on OCR GCSE Chemistry Monitoring chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.