Question

experiment 2: effect of particle size - describe what happened to the crushed tablets: - describe what happened to the whole tablets: - which dissolved faster and why do you think this occurred? experiment 3: effect of temperature - hot water results: - cold water results: - what differences did you notice between the two?

Explanation:

For Experiment 2, crushed tablets have larger surface - area to volume ratio, increasing contact with the solvent and speeding up dissolution. Whole tablets have smaller exposed surface area. For Experiment 3, higher temperature increases kinetic energy of solvent molecules, enhancing dissolution rate.
For Experiment 2:

• Crushed tablets: They dissolved more quickly as more of the tablet's surface was exposed to the solvent.
• Whole tablets: They dissolved more slowly due to less surface area in contact with the solvent.
• Faster - dissolving: Crushed tablets dissolved faster because of their increased surface area which allows for more efficient interaction with the solvent.

For Experiment 3:

• Hot water results: Tablets dissolved faster in hot water as the increased temperature provides more kinetic energy to the solvent molecules, enabling them to collide more frequently and with greater force with the tablet, thus accelerating the dissolution process.
• Cold water results: Tablets dissolved more slowly in cold water as the solvent molecules have less kinetic energy and interact less vigorously with the tablet.
• Differences: The main difference is the dissolution rate, with tablets dissolving much faster in hot water compared to cold water.

Answer:

For Experiment 2:

• Crushed tablets: Dissolved more quickly due to larger exposed surface area.
• Whole tablets: Dissolved more slowly due to smaller exposed surface area.
• Faster - dissolving: Crushed tablets, because of increased surface area for solvent - tablet interaction.

For Experiment 3:

• Hot water results: Tablets dissolved faster due to higher kinetic energy of solvent molecules.
• Cold water results: Tablets dissolved more slowly due to lower kinetic energy of solvent molecules.
• Differences: Tablets dissolved much faster in hot water than in cold water.