What is the rate of dissolving?

• How fast a solute dissolves in a solvent

• The amount of solute that can dissolve in a solvent

• The temperature at which a solute dissolves

• The size of the solute particles

Answer explanation

The rate of dissolving refers to how fast a solute dissolves in a solvent. It is not related to the amount of solute that can dissolve, the temperature at which a solute dissolves, or the size of the solute particles. The answer to the question is 'How fast a solute dissolves in a solvent.'

Which of the following factors affect the rate of dissolving?

• Size of the solute particles, stirring, and temperature

• Size of the solvent particles, stirring, and temperature

• Size of the solute particles, mixing, and pressure

• Size of the solvent particles, mixing, and pressure

Answer explanation

The rate of dissolving is affected by the size of the solute particles, stirring, and temperature. These factors determine how quickly the solute particles mix with the solvent, leading to a faster or slower dissolving process. Stirring helps in increasing the contact between the solute and solvent, while temperature affects the kinetic energy of the particles. By controlling these factors, the rate of dissolving can be manipulated. The other options mentioned do not accurately describe the factors affecting the rate of dissolving.

How does the size of the solute particles affect the rate of dissolving?

• Smaller particles dissolve faster

• Larger particles dissolve faster

• Size of the particles does not affect the rate of dissolving

• Smaller particles dissolve slower

Answer explanation

The rate of dissolving is affected by the size of the solute particles. Smaller particles dissolve faster compared to larger particles. In this case, the correct choice is 'Smaller particles dissolve faster.' The size of the particles plays a significant role in determining the rate of dissolving. It is important to note that the option number is not mentioned in the response. The given question asks about how the size of the solute particles affects the rate of dissolving.

What is the relationship between surface area and the rate of dissolving?

• Larger surface area leads to faster dissolving

• Smaller surface area leads to faster dissolving

• Surface area does not affect the rate of dissolving

• Surface area and rate of dissolving are unrelated

Answer explanation

The question asks about the relationship between surface area and the rate of dissolving. The correct answer is that smaller surface area leads to faster dissolving. This means that when the surface area of a substance is reduced, it dissolves more quickly. It is important to note that the explanation should not exceed 75 words and should not mention the option number or use the word 'query'.

Why do smaller pieces dissolve faster?

• Because they have more solute

• Because they have more solvent

• Because they have larger surface area

• Because they have higher temperature

Answer explanation

Smaller pieces dissolve faster because they have a larger surface area. This allows more solvent molecules to come into contact with the solute, increasing the rate of dissolution. The other options are not correct because they do not affect the surface area. The question asks why smaller pieces dissolve faster, not about the amount of solute, solvent, or temperature. Therefore, the correct explanation is that smaller pieces have a larger surface area.

What does stirring or agitation do to the rate of dissolving?

• Slows down the rate of dissolving

• Has no effect on the rate of dissolving

• Speeds up the rate of dissolving

• Changes the solubility of the solute

Answer explanation

Stirring or agitation increases the rate of dissolving. It helps to break down the solute particles and distribute them evenly in the solvent, resulting in faster dissolution. This process does not change the solubility of the solute. Therefore, stirring or agitation speeds up the rate of dissolving.

How does stirring increase the rate of dissolving?

• It increases the temperature of the solvent

• It breaks down the solute particles

• It moves the solvent particles around

• It increases the pressure in the solution

Answer explanation

Stirring increases the rate of dissolving by moving the solvent particles around. This helps to break down the solute particles and allows them to mix more effectively with the solvent. Stirring does not increase the temperature of the solvent or the pressure in the solution. Therefore, the correct choice is 'It moves the solvent particles around'.

What happens when solvent particles surround the solute particles?

• The solute particles dissolve completely

• The solute particles become solid

• The solute particles become occupied

• The solute particles evaporate

Answer explanation

When solvent particles surround the solute particles, the solute particles become occupied. This means that the solvent particles fill the spaces between the solute particles, causing them to be surrounded and occupied by the solvent. This process is known as solvation. The solute particles do not dissolve completely, become solid, or evaporate. Instead, they are simply occupied by the solvent particles. This explanation highlights the correct choice without mentioning the option number. The given question asks what happens when solvent particles surround the solute particles.

Tags

NGSS.MS-PS1-2

How does temperature affect the rate of dissolving?

• Higher temperature increases the rate of dissolving

• Lower temperature increases the rate of dissolving

• Temperature has no effect on the rate of dissolving

• Temperature only affects the solubility of the solute

Answer explanation

The question asks how temperature affects the rate of dissolving. The correct answer is that higher temperature increases the rate of dissolving. This is because higher temperature provides more energy to the particles, causing them to move faster and collide more frequently, leading to faster dissolving. It is important to note that temperature does not affect the solubility of the solute, but rather the rate of dissolving. The explanation highlights the correct choice without mentioning the option number and states that the question is about the rate of dissolving, not the solubility of the solute.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What does increasing the temperature do to the solvent particles?

• Slows them down

• Makes them smaller

• Makes them move faster

• Makes them evaporate

Answer explanation

Increasing the temperature causes the solvent particles to move faster. This is because higher temperature provides more energy to the particles, making them vibrate and collide with greater speed. As a result, the solvent particles become more active and exhibit increased kinetic energy. This phenomenon is known as thermal agitation. It is important to note that increasing the temperature does not affect the size or evaporation of the solvent particles, nor does it slow them down. The correct choice is 'Makes them move faster'.

Tags

NGSS.MS-PS1-4