An analytical chemist prepares a standard reference solution of sodium thiosulfate for a titration. They dissolve 18.75 g of anhydrous sodium thiosulfate in distilled water and make the total volume up to 250 cm3 in a volumetric flask.
Calculate the concentration of this sodium thiosulfate solution in g dm−3\text{g~dm}^{-3}g dm−3.
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.