This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
Here's the completed and corrected information for the tables: Top Table OBSERVATION: The solution gradually becomes cloudy and a cross marked below the beaker becomes invisible. INFERENCE: Sulfur is formed as a precipitate, indicating the progress of the reaction. The time taken for the cross to disappear is used to determine the reaction rate. Part (i) OBSERVATION: Volume of sodium thiosulphate solution taken = 40 cm³ INFERENCE: Time taken for the cross to disappear = 25 seconds (This information is already provided and correct.) Part (ii) OBSERVATION: Volume of water added = 10 cm³ INFERENCE: Concentration of thiosulphate is lower, reaction is slower. (The original inference was incorrect. Adding water dilutes the solution, decreasing the concentration and thus slowing down the reaction.) Part (iii) OBSERVATION: Volume of dilute HCl added = 10 cm³ INFERENCE: A pale yellow precipitate of sulphur is formed. (This information is already provided and correct.) Part (iv) OBSERVATION: Temperature of the mixture = 30°C INFERENCE: Rate of reaction increases with temperature. (This information is already provided and correct.) Send me the next one 📸