An environmental scientist needs to prepare a standard solution of potassium permanganate to analyze the chemical oxygen demand of a waste-water sample.
The scientist requires 115 cm3115\text{ cm}^3115 cm3 of potassium permanganate solution with a concentration of 64 g dm−364\text{ g dm}^{-3}64 g dm−3.
Calculate the mass of potassium permanganate that must be dissolved in distilled water to produce 115 cm3115\text{ cm}^3115 cm3 of solution at this concentration.
Give your answer to 2 significant figures.
258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.