Wk 21_Solutions test: concentration, molarity, molality, etc

What is the molarity of a 0.5L sample of a solution that contains 60.0 g of sodium hydroxide (NaOH)

• 0.8 M

• 1.5M

• 3.0M

• 6.0M

A student is preparing solutions for a laboratory experiment by dissolving solid solutes in liquid solvents. Which action will increase the rate of solubility

• lowering the temperature of the solvent

• stirring the solute in the solution

• increasing the pressure on the solution

• increasing the particle size of the solute

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of the following is the correct formula for calculating molarity?

• moles/liters of solution

• moles/kg of solvent

• # particles/Avogadro's #

• theoretical yield/actual yield

Which of the following types of solutions has more room to dissolve solute?

• supersaturated

• saturated

• unsaturated

When calculating molality, Kg of the following are included in the calculation?

• solvent

• solute

• none of these

• solvent & solute

What is the molality of a solution in which 3.0 moles of NaCl is dissolved in 1.5 Kg of water?

• 2.0 M

• 0.22 m

• 135 m

• 2.0m

What is a solvent?

• The substance that does the dissolving in a solution.
• The substance that is being dissolved in a solution.
• The mixing of different substances.
• The process in which neutral molecules lose or gain electrons

The concentration of a mixture can be increased in which of the following ways?

• Heating the mixture
• Adding more water “solvent”
• Adding more powder “solute”
• Stirring the mixture

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

Another name for a homogeneous mixture is 

• an element.
• a solution.
• a compound.

Electrolytes

• don't conduct electricity

• conduct electricity

Tags

NGSS.HS-PS1-1