Solutions Test

Which solution is the most concentrated?

• mole of solute dissolved in 1 liter of solution

• 2 moles of solute dissolved in 3 liters of solution

• 6 moles of solute dissolved in 4 liters of solution

• 4 moles of solute dissolved in 8 liters of solution

Compared to pure water, an aqueous solution of calcium chloride has a

• High boiling point and higher freezing point

• Higher boiling point and lower freezing point

• Lower boiling point and higher freezing point

• Lower boiling point and lower freezing point

Which solution will freeze at the lowest temperature?

• mole of sugar in 500g of water

• mole of sugar in 1000 g of water

• moles of sugar in 500 g of water

• moles of sugar in 1000g of water

Which 1-molal aqueous solution has the lowest freezing point?

• A

• B

• C

• D

Show a correct numerical setup for determining how many liters of a 1.2M solution can be prepared with 0.50 moles of C6H12O6.

According to Reference Table G, how many grams of KClO3 must be dissolved in 100 grams of H2O at 10*C to produce a saturated solution?

A student uses 200grams of water at a temperature of 60*C to prepare a saturated solution of potassium chloride, KCl. This solution is cooled to 10*C and the excess KCl precipitates (settles out). The resulting solution is saturated at 10*C. How many grams of KCl precipitated out of the original solution?

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What does the diagram illustrate?

• A hypertonic solution inside the cell.

• Two isotonic solutions.

• Phagocytosis

• A hypotonic solution outside the cell.

Tags

NGSS.MS-PS1-2

Imagine a bag that has salty water in it. The bag is permeable to water, but not salt. The bag is put into a cup that has pure water in it. Choose all that apply.

• The solution in the bag is hypertonic.

• The bag will swell.

• Given enough time, the solutions will reach equilibrium.

• Osmosis is occurring.

• Choose this one! The best way to answer questions like this is to draw it out! Choose this one! This is one of the correct answers.

A cell is put into a solution that has the same concentration of solutes as the solution inside the cells. The membrane is permeable to water, but nothing else. Check all that are true.

• The solutions are isotonic.

• The solutions are at equilibrium.

• Water is moving across the membrane in both directions.

• The cell is gaining mass.