The boiling point of a solution is ______ the boiling point of the pure solvent.

• higher than
• the same as
• lower than
• higher or lower than

Tags

NGSS.HS-PS3-4

Molality is measured in

• mols per kg
• mols per L
• mols per kJ
• mols per mL

Which technique could increase or speed up the rate of dissolving?

• Allowing the mixture to settle
• Stirring the mixture
• Adding more powder
• Adding more water

Tags

NGSS.HS-PS1-5

What does it mean to be "Soluble" ?

• Capable of being a solid.
• To have soul.
• Capable of being dissolved.
• To sink.

What is a substance that is dissolved in another substance? 

• solution
• solute
• solvent
• compound

The freezing point of a solution is ____ the freezing point of the pure solvent.

• the same as
• lower than
• higher than
• no relation to

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

• -2.8°C
• -1.2°C
• -0.81°C
• 0.81°C

Colligative properties depend on the _________ of the solute but not the __________ of the solute.

•  concentration; identity
• identity; concentration
• reactivity; nature
• nature; reactivity

A solution has 10 moles of ammonia in 2L of solution. What is the molarity? 

• 5.0 M
• 20 M
• 0.5 M
• 0.2 M

How many moles of HNO₃ are needed to prepare 5L of a 2M solution? 

• 10 mol
• 2.5 mol
• 0.4 mol 
• 100 mol 

Tags

NGSS.HS-PS1-7