Three sodium hydroxide solutions are prepared. (Mr M_r\,Mr of NaOH = 40) Solution X: 4.00 g of NaOH dissolved in water to make 500 cm3500\,\mathrm{cm^{3}}500cm3 of solution Solution Y: 0.150 mol dm−30.150\,\mathrm{mol\,dm^{-3}}0.150moldm−3 Solution Z: 3.20 g dm−33.20\,\mathrm{g\,dm^{-3}}3.20gdm−3
Which shows the solutions in order of concentration, highest first?
Y > X > Z
X > Y > Z
Z > X > Y
Y > Z > X
157 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.