Which of the following usually makes a substance dissolve faster in a solvent

Asked by wiki @ in Chemistry viewed by 318 People

1. Which of the following usually makes a substance dissolve faster in a solvent? (1 point)
agitating the solution
increasing the particle size of the solute
lowering the temperature
decreasing the number of particles
2. Which of the following expressions is generally used for solubility? (1 point)grams of solute per 100 grams of solventgrams of solvent per 100 milliliters of solutegrams of solute per 100 grams of solutiongrams of solute per 100 milliliters of solution3. A crystal added to an aqueous solution causes many particles to come out of the solution. Justbefore adding the crystal, the solution was __________.(1 point)unsaturatedsaturatedan emulsionsupersaturated4. What happens to the solubility of a gas, in a liquid, if the partial pressure of the gas above theliquid decreases?(1 point)The solubility decreases.The solubility increases.The solubility remains the same.The solubility cannot be determined.

Answered by wiki @

The question no. 1

Answer:

The correct answer is option A which is agitating the solution.

Explanation:

  • To increase the solubility of the solution we need to increase the kinetic energy of the particles.
  • Agitating increase the energy of the solution and increasing the solubility.
  • While lowering the temperature decreases the energy and increasing particle size lower the surface area for solubility.
  • Thus decreasing the solubility.
  • So the correct answer is option A.

The question no. 2

Answer:

The correct answer is option D which is grams of solute per 100 milliliters of solution.

Explanation:

  • The solubility of a solute can be described in the mass of solute dissolved in the volume of the solution.
  • Hence the standard expression will be grams of solute in 100 ml volume of the solution.
  • So the correct option about units of solubility is D.

Question no.3

Answer:

The correct answer is option B which is a solution is saturated.

Explanation:

  • A saturated solution is a type of solution which contains the maximum amount of soluble solute at room temperature.
  • Any addition of the solute in saturated solution will lead to the crystallization of the solute at room temperature.
  • So the solution described in question will be a saturated solution.

Question no.4

Answer:

The correct answer is option A which is the solubility of the solution will decrease.

Explanation:

  • The solubility and the partial pressure of the gas are directly proportional to each other.
  • So by decreasing the partial pressure of the gas will leads to a low number of gas molecules to dissolve in the liquid.
  • Which leads to the decrease in the solubility of gas into a liquid.



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