Solution Concentration and Colligative Properties

How many moles of HCl (molar mass = 36.46g/mol) are present in .70L of a .33M HCl solution. $\ Molarity=\ \frac{moles\ ofsolute}{L\ of\ solution}$  

• .23 mol

• .28 mol

• .38 mol

• .47 mol

Tags

NGSS.HS-PS1-7

If the temperature stays the same, the solubility of gases in liquids

• increases with increasing pressure

• cannot reach equilibrium

• decreases with increasing pressure

• does not depend on pressure

What mass of Iodine, (molar mass= 253.80 g/mol), must be used to prepare a .960m solution if 100.0g of ethanol, CH3CH2OH, is used? $molality=\ \frac{moles\ of\ solute}{kg\ solvent}$  

• 50.0 g

• 96.0 g

• 2.54 g

• 24.4 g

What is the molarity of a solution composed of 8.210 g of potassium chromate, (molar mass= 194.20g/mol), dissolved in enough water to make .500L of solution?

​
   $Molarity=\ \frac{molesofsolute}{L\ of\ solution}$  

• .0423 M

• .0846 M

• 16.4 M

• .172 M

A 2m solution contains

• 2 mol of solute dissolved in 1L of solvent

• 1 mol of solute dissolved in 2L of solvent

• 2 mol of solute dissolved in 1 mol of solvent

• 2 mol of solute dissolved in 1 kg of solvent

Which of the following compounds is insoluble in water? Consult table on p.413.

• (NH4)2S-ammonium sulfide

• NA2O-sodium oxide

• KNO3-potassium nitrate

• AgCl-silver chloride

Tags

NGSS.HS-ESS2-5

NGSS.HS-PS1-1

When an ionic solid dissolves in water, which of the following does not occur?

• The compound dissociates

• The compound ionizes

Tags

NGSS.HS-PS1-3

Colligative properties depend on the

• number of solute particles present

• size of solute particles present

• mass of solute particles present

• charge on solute particles present

Nonvolatile solutes

• depress both the freezing point and the boiling point

• elevate both the freezing point and the boiling point

• depress the freezing point and elevate the boiling point

• elevate the freezing point and depress the boiling point

What is the freezing point of a 1.5m solution of sucrose in water? (Kf= -1.86 C/m)

• -2.8 degrees C

• -1.2 degrees C

• - .81 degrees C

• .81 degrees C