Solutions Colligative

Which of the following solutions will have the lowest freezing point?

• 1.0 mol/L sucrose (C₁₂H₂₂O₁₁)

• 1.0 mol/L lithium chloride (LiCl)

• 1.0 mol/L sodium phosphide (Na₃P)

• 1.0 mol/L magnesium fluoride (MgF₂)

Which of the following compounds will be most effective in melting the ice on the roads when the air temperature is below zero?

• sodium iodide (NaI)

• magnesium sulfate (MgSO₄)

• potassium bromide (KBr)

• all will be equally effective

Tags

NGSS.HS-PS3-4

Which solution has the lowest freezing point?

• 10. g of KI dissolved in 100. g of water

• 20. g of KI dissolved in 200. g of water

• 30. g of KI dissolved in 100. g of water

• 40. g of KI dissolved in 200. g of water

Which sample, when dissolved in 1.0 liter of water, produces a solution with the lowest freezing point?

• 0.1 mol of C₂H₅OH

• 0.1 mol of LiBr

• 0.2 mol of C₆H₁₂O₆

• 0.2 mol of CaCl₂

Compared to the freezing point and boiling point of water at 1 atmosphere, a solution of a salt and water at 1 atmosphere has a

• lower freezing point and a lower boiling point

• lower freezing point and a higher boiling point

• higher freezing point and a lower boiling point

• higher freezing point and a higher boiling point

Compared to the freezing point of 1.0 M KCl(aq) at standard pressure, the freezing point of 1.0 M CaCl₂(aq) at standard pressure is

• lower

• higher

• the same

Compared to a 0.1 M aqueous solution of NaCl, a 0.8 M aqueous solution of NaCl has a

• higher boiling point and a higher freezing point

• higher boiling point and a lower freezing point

• lower boiling point and a higher freezing point

• lower boiling point and a lower freezing point

Which solution has the highest boiling point at standard pressure?

• 0.10 M KCl(aq)

• 0.10 M K₂SO₄(aq)

• 0.10 M K₃PO₄(aq)

• 0.10 M KNO₃(aq)

A solution consists of 0.50 mole of CaCl₂ dissolved in 100. grams of H₂O at 25°C. Compared to the boiling point and freezing point of 100. grams of H₂O at standard pressure, the solution of CaCl₂ at standard pressure has

• lower freezing point and a lower boiling point

• lower freezing point and a higher boiling point

• higher freezing point and a lower boiling point

• higher freezing point and a higher boiling point

The table above gives information about four aqueous solutions at standard pressure.

Which list of solutions is arranged in order from highest boiling point to lowest boiling point?

• A, B, D, C

• A, C, B, D

• C, D, B, A

• D, B, C, A

Tags

NGSS.HS-PS3-4