A student is diluting concentrated sulfuric acid and preparing to test its properties. The experiment involves observing the reaction with water and identifying the resulting solution. The student als

Question

Asked on May 19, 2026Chemistry

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.

Accepted Answer · 2026-05-19T18:22:51.617Z

Here are the solutions to the questions: 3. (a) I: Concentrated sulphuric acid II: Dropper/Bottle III: Water IV: Beaker 3. (b) Diluting concentrated sulfuric acid is a highly exothermic process. Adding the acid slowly to water, rather than water to acid, allows the large amount of heat generated to dissipate safely into the larger volume of water, preventing the water from boiling violently and splashing the corrosive acid. 3. (c) Precaution 1: Add the concentrated acid slowly* to the water. Explanation: This controls the rate of heat release, preventing the solution from boiling rapidly and splashing. Precaution 2: Stir* the mixture constantly while adding the acid. Explanation: This ensures even distribution of heat throughout the solution, preventing localized overheating. 3. (d) Two protective devices are: Safety goggles* Lab coat* 3. (e) To confirm the diluted solution is an acid, one could: Use blue litmus paper, which would turn red*. Use a pH meter, which would show a pH value less than 7*. 4. (i) (a) The man is suffering from myopia (short-sightedness). 4. (i) (b) The defect is caused by the eyeball being too long or the lens being too powerful, causing light to focus in front of the retina. 4. (i) (c) A concave lens (diverging lens) would be needed to correct the defect. 4. (ii) (a) : Stopper/Cork : Vacuum : Silvered surface 4. (ii) (b) Heat lost by conduction is prevented by the vacuum between the double walls and the stopper, which are poor conductors of heat. 4. (ii) (c) Heat lost by convection is prevented by the vacuum between the double walls (as there is no medium for convection) and the stopper (which prevents air from entering or leaving). 4. (ii) (d) Heat lost by radiation is prevented by the silvered surfaces of the inner and outer walls, which reflect radiant heat. That's 2 down. 3 left today — send the next one.

Accepted Answer · 2026-05-19T18:22:51.617Z

Here are the solutions to the questions: 3. (a) I: Concentrated sulphuric acid II: Dropper/Bottle III: Water IV: Beaker 3. (b) Diluting concentrated sulfuric acid is a highly exothermic process. Adding the acid slowly to water, rather than water to acid, allows the large amount of heat generated to dissipate safely into the larger volume of water, preventing the water from boiling violently and splashing the corrosive acid. 3. (c) Precaution 1: Add the concentrated acid slowly* to the water. Explanation: This controls the rate of heat release, preventing the solution from boiling rapidly and splashing. Precaution 2: Stir* the mixture constantly while adding the acid. Explanation: This ensures even distribution of heat throughout the solution, preventing localized overheating. 3. (d) Two protective devices are: Safety goggles* Lab coat* 3. (e) To confirm the diluted solution is an acid, one could: Use blue litmus paper, which would turn red*. Use a pH meter, which would show a pH value less than 7*. 4. (i) (a) The man is suffering from myopia (short-sightedness). 4. (i) (b) The defect is caused by the eyeball being too long or the lens being too powerful, causing light to focus in front of the retina. 4. (i) (c) A concave lens (diverging lens) would be needed to correct the defect. 4. (ii) (a) : Stopper/Cork : Vacuum : Silvered surface 4. (ii) (b) Heat lost by conduction is prevented by the vacuum between the double walls and the stopper, which are poor conductors of heat. 4. (ii) (c) Heat lost by convection is prevented by the vacuum between the double walls (as there is no medium for convection) and the stopper (which prevents air from entering or leaving). 4. (ii) (d) Heat lost by radiation is prevented by the silvered surfaces of the inner and outer walls, which reflect radiant heat. That's 2 down. 3 left today — send the next one.

A student is diluting concentrated sulfuric acid and preparing to test its properties. The experiment involves observing the reaction with water and identifying the resulting solution. The student als

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A student is diluting concentrated sulfuric acid and preparing to test its properties. The experiment involves observing the reaction with water and identifying the resulting solution. The student als

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