# Short-Questions

Fast solutions for complex problems

22

## What factor decreases the rate of solution?

Because all chemical-reaction rates are tied to temperature, lowering the temperature of a solvation reaction will decrease its rate, all other factors being equal.

### Which of the following will decrease the rate of dissolution of a solute in a solvent?

Stirring. Stirring a solute into a solvent speeds up the rate of dissolving because it helps distribute the solute particles throughout the solvent.

What are 3 factors that affect the rate of dissolving?

The rate of dissolving depends on the surface area (solute in solid state), temperature and amount of stirring.

Which of the following decreases the rate of dissolving for a solid substance?

Stirring brings new solids in contact with fresh solute which speeds up dissolving. Decreasing temperature decreases the kinetic energy of the molecules which slows dissolving.

## What are the 5 factors that affect solubility?

What are the 5 factors that affect solubility?

• Temperature. Basically, solubility increases with temperature.
• Polarity. In most cases solutes dissolve in solvents that have a similar polarity.
• Pressure. Solid and liquid solutes.
• Molecular size.
• Stirring increases the speed of dissolving.

### What does the rate of solution measure?

The rate of solution is: a measure of how fast a substance dissolves. Size of the particles — When a solute dissolves, the action takes place only at the surface of each particle. When the total surface area of the solute particles is increased, the solute dissolves more rapidly.

Which solute dissolves faster in hot water?

Sugar
Sugar dissolves faster in hot water than it does in cold water because hot water has more energy than cold water. When water is heated, the molecules gain energy and, thus, move faster. As they move faster, they come into contact with the sugar more often, causing it to dissolve faster.

What are 3 ways to make something dissolve faster?

There are three ways to make solids dissolve faster: Break the solute into smaller pieces. Stir the mixture. * Heat the mixture.

## What are 3 ways to speed up dissolving?

If you are trying to dissolve a substance, you have three primary avenues to increase the dissolution rate: decreasing the particle size of the solid, increasing the temperature and/or increasing the mixing or stirring rate.

### Does pH affect solubility?

For ionic compounds containing basic anions, solubility increases as the pH of the solution is decreased. For ionic compounds containing anions of negligible basicity (such as the conjugate bases of strong acids), solubility is unaffected by changes in pH.

What are 3 ways to increase solubility?

Three ways I can come up with are increasing the temperature, increased the amount of solvent, and using a solvent with similar polarity as the solute.

Which is the following decreases the average speed of solvent molecules?

Which of the following decreases the average speed of solvent molecules Decreasing the temperature Which of the following would dissolve moves rapidly Powdered sugar and hot water If the amount of solute present in the solution at a given temperature is less than the maximum amount that can be dissolved at the temperature the solution is said to be

## How does the solubility of solvents change with temperature?

If we heat the solvent, the average kinetic energies of its molecules increases. Hence, the solvent is able to dislodge more particles from the surface of the solute. Thus, increasing the temperature increases the solubilities of substances. For example, sugar and salt are more soluble in water at higher temperatures.

### How does the surface area between solute and solvent affect the rate of dissolution?

Increasing the surface area between solute and solvent Increases the rate of dissolution Which of the following decreases the average speed of solvent molecules Decreasing the temperature Which of the following would dissolve moves rapidly

What can increase or decrease the rate of dissolution?

Can increase, decrease, or have no effect on the rate of dissolution Which of the following decreases the average speed of solvent molecules? a. Increasing the temperature b. Stirring the solution d. Decreasing the temperature Which of the following will dissolve most rapidly? a. Sugar cubes in cold water b. Sugar cubes in hot water d.