Chemistry Solution

What is a dilute solution?

• A dilute solution is a solution with a high concentration of solute relative to the solvent.

• A dilute solution is a solution that has equal parts of solute and solvent.

• A dilute solution is a solution that has no solute dissolved in the solvent.

• A dilute solution is a solution that has a low concentration of solute relative to the solvent.

How can you increase the rate of dissolution of a solute in a solvent?

• Adding more solvent to the solution

• Using a solute with a higher molecular weight

• Decreasing the temperature of the solvent

• By increasing the temperature of the solvent, stirring/agitating the solution, decreasing the particle size of the solute, or increasing the surface area of the solute.

In the above picture, a powder is about to be poured into the liquid. Which of the following should be done to make this powder dissolve faster?

• stir the powder in the liquid

• freeze the mixture

• add more powder to the liquid

• store the mixture in a dark place

How many grams of K₂Cr₂O₇, are soluble in 100 g of water at 95 ºC?

• 83 grams

• 75 grams

• 40 grams

• 12 grams

Tags

NGSS.MS-PS1-4

Which solute is the most soluble at 10 ⁰C?

• KI

• KClO₃

• NH₄Cl

• NH₃

Tags

NGSS.MS-PS1-2

When 20 grams of potassium chlorate, KClO₃, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:

• supersaturated

• saturated

• unsaturated

Tags

NGSS.MS-PS1-2

Which of the following actions will NOT increase the rate of dissolution (dissolving)?

• Stirring the solution

• Decreasing the temperature

• Increasing the surface area of the

  solute

• Increasing the temperature

What is it about the water molecule that makes it a great solvent?

• water demonstrates polarity; a partial charge on each side of the molecule

• due to its molecular formula

• it has a liner molecular shape

• due to it's non-polar molecular structure

Tags

NGSS.MS-PS1-1

What is the molarity of 4 g of NaCl (MM=58.45) in 3,800 mL of solution?

• 0.018 M

• 0.0011 M

• 1.052 M

• 0.062 M

How many grams of solute are dissolved in 125.0 mL of 5.00 M NaCl (MM = 58.45)?

• 0.625 g NaCl

• 625 g NaCl

• 36.5 g NaCl

• 0.04 mol NaCl

Tags

NGSS.MS-PS1-1