Molarity and Solubility

Solubility Curves & Dilutions

By Kristy Hilt

Multiple Choice

What is Molarity?

• the number of moles of solute per liter of solution

• the number of moles of solute per liter of solvent

• the number of liters of solute per mole of solution

• the number of grams of solute per liter of solution

Think about how solutions are made. We account for the moles of solute per volume of solution we want to make.

Molarity

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Multiple Choice

Solution where more solute can still be dissolved at the given temperature. 

• Saturated
• Unsaturated
• Supersaturated
• Homogeneous solution

​How do we read this??!

A 'point' (mass of solute and temperature) will be provided. Find that point and compare it to the curve for that solute.

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In relation to the solute's curve, if the 'point' is​...

• BELOW solution is unsaturated

• ​ON solution is saturated

• ABOVE solution is super saturated​

Multiple Choice

When 40 grams of NaCl is dissolved in 100 grams of water at 90 ºC, the solution can be correctly described as:

• supersaturated

• saturated

• unsaturated

Multiple Choice

When 30 grams of NaCl is dissolved in 100 grams of water at 90 ºC, the solution can be correctly described as:

• supersaturated

• saturated

• unsaturated

Multiple Choice

When 60 grams of NaCl is dissolved in 100 grams of water at 90 ºC, the solution can be correctly described as:

• supersaturated

• saturated

• unsaturated

Multiple Choice

Which substance is least soluble at 0 ºC?

• KI

• KNO₃

• KClO3

• Ce₂(SO₄)₃

Multiple Choice

How many grams are soluble in 100 g of water at 100 ºC?

• 300 grams

• 250 grams

• 100 grams

• 50 grams

Multiple Choice

Which solute is most likely a gas?

• NH₃

• NaNO₃

• KCl

• NaCl

Multiple Choice

When 100. mL of 6.00M HCl is diluted to 300. mL, the final concentration is

• 1.00 M

• 3.00 M

• 2.00 M

• 12.0 M

Multiple Choice

What volume of 1.50 M KBr can be made from 15.6 mL of concentrated KBr with a molarity of 9.65 M?

• 150. mL
• 151 mL
• 1.00 L
• 100. mL

Multiple Choice

If I dilute 250 mL of 0.10 M lithium acetate solution to a volume of 750 mL, what will the concentration of this solution be?

• 2 M

• 0.02 M

• 0.033 M

• 0.08 M