Solutions Review

Which of the following does not increase the rate of dissolving a solid in a liquid?

• stirring the solution
• crushing up the solute
• raising the temperature of the water
• lowering the temperature of the water

Tags

NGSS.HS-PS3-4

Why will sugar dissolve in water?

• sugar is ionic
• sugar has a similar polarity to water
• sugar will not dissolve in water
• sugar has similar energy to water

Calculate the molarity of a solution prepared by dissolving 78.2 grams of CaCl₂ in 500.0mls of water

• 0.156 M
• 0.709 M
• 0.353 M
• 1.41 M

How many grams of ammonium chloride are needed to make a saturated solution at 80^o C?

• 50 grams
• 80 grams
• 65 grams
• 75 grams

At 40^oC which salt is least soluble?

• KClO₃
• NaCl
• KI
• KNO₃

Tags

NGSS.HS-PS1-3

What kind of solution is made from 50 grams of KNO₃ at 40^oC?

• saturated
• unsaturated
• supersaturated

What mass of NaCl is needed to prepare 850 mls of 6.0 M NaCl solution?

• 5.1 grams
• 0.087 grams
• 87 grams
• 298 grams

What is the molarity of  420 mls of a KCl solution that contains 16.0 grams of KCl

• 625 M
• 0.51 M
• 3.19 M
• 0.00563 M

How much of the 12.0 M stock solution do you need to prepare 250 mls of .20M HCl?

• 15,000 mls
• 4.17 mls
• 9.6 mls
• 0.0096 mls

If the amount of solute present in a solution is more than the maximum than can be dissolved, the solution is

• saturated
• unsaturated
• supersaturated
• colloidal