A student investigates how temperature affects the rate of reaction between sodium thiosulfate solution and dilute nitric acid.
During the reaction, a solid precipitate of sulfur forms, making the mixture go cloudy.
Describe a method the student could use to measure the time taken for the mixture to reach a specific level of cloudiness.
127 exam-style questions on Edexcel GCSE Chemistry 8.1 Rates of reaction, covering 8.1.1 Measuring and interpreting rates of reaction, 8.1.2 Collision theory and the factors affecting rate, and 8.1.3 Catalysts and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.