T2-20- Molarity vs. Molality

What do molarity and molality have in common?

• Both have "moles solute" in the numerator

• Both have "kg solvent" in the denominator

• Both have "L solution" in the denominator

• Both have "moles solution" in the denominator

Which equation is used to find molarity?

• Moles solute/L solution

• Moles solute/kg solution

• Moles solute/kg solvent

• Grams solute/L solution

Which equation is used to find molality?

• Moles solute/L solution

• Moles solute/kg solution

• Moles solute/kg solvent

• Grams solute/L solution

How do you convert from grams to moles?

• Divide by the molar mass

• Multiply by the molar mass

• Divide by Avogadro's number

• Multiply by Avogadro's number

What are the units of molarity?

• mol.L

• mol/L

• m/L

• L/m

Tags

NGSS.HS-PS1-5

What are the units of molality?

• M

• m

• Ml

• Mm

What is the molarity of a solution in which 58 g of NaCl are dissolved in 1.0 L of solution?

• 100 M

• 1.5 m

• 1.0 M

• 1.0 m

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

How many moles of NaCl are present in a solution with a molarity of 8.59M and 125 mL of solution?

• 1.07 gram
• 62.7 mol
• 1.07 mol
• 62.7 grams

What is the effect of increasing temperature on the molality of a solution?

• molality increases

• molality decreases

• molality stays the same