Magnesium ribbon reacts with dilute hydrochloric acid to produce hydrogen gas.
magnesium+hydrochloric acid→magnesium chloride+hydrogen \text{magnesium} + \text{hydrochloric acid} \rightarrow \text{magnesium chloride} + \text{hydrogen} magnesium+hydrochloric acid→magnesium chloride+hydrogenA student investigated the effect of doubling the concentration of the hydrochloric acid on this reaction.
The student made the following prediction:
"When the concentration of the hydrochloric acid is doubled, the initial rate of reaction will double and the overall reaction will show a greater increase in temperature."
Devise a plan, including the apparatus you would use, to test this student's complete prediction.
You are provided with strips of magnesium ribbon, a thermometer, and two bottles of dilute hydrochloric acid. One bottle of hydrochloric acid is exactly double the concentration of the other.
87 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.