An industrial chemist used a volumetric flask to prepare 250.0 cm3250.0\text{ cm}^3250.0 cm3 of a standard sodium hydroxide solution.
The volumetric flask is calibrated to 250.0±0.15 cm3250.0 \pm 0.15\text{ cm}^3250.0±0.15 cm3.
Calculate the percentage uncertainty in the volume measured using this volumetric flask.
Use the equation:
percentage uncertainty=uncertaintyvolume measured×100 \text{percentage uncertainty} = \frac{\text{uncertainty}}{\text{volume measured}} \times 100 percentage uncertainty=volume measureduncertainty×10053 exam-style questions on AQA GCSE Chemistry 3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations, covering 3.1.1 Conservation of mass and balanced chemical equations, 3.1.2 Relative formula mass, 3.1.3 Mass changes when a reactant or product is a gas, and 3.1.4 Chemical measurements. Each one has a worked solution and a mark scheme showing where the marks go.