Molarity and Dilutions

Which one of the following diagrams has the highest boiling point?

• 1

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-2

While making homemade ice cream, you add rock salt to the ice. Which choice below provides the best explanation for why this is done?

• Adding salt to the ice will lower the freezing point by creating a solution that's freezing point is lower than just the ice.

• Adding salt to the ice will lower the freezing point by creating a solution that's freezing point is higher than just the ice.

• Adding salt to the ice will raise the freezing point by creating a solution that's freezing point is lower than just the ice.

• Adding salt to the ice will raise the freezing point by creating a solution that's freezing point is higher than just the ice.

Tags

NGSS.MS-PS1-4

How many grams of solute are dissolved in 125.0 mL of 5.00 M NaCl (MM = 58.45)?

• 0.625 g NaCl
• 625 g NaCl
• 36.5 g NaCl
• 0.04 mol NaCl

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

• 1074 mol
• 0.069 mol
• 1.07 mol
• 62.7 mol

Which sweet tea would you expect to taste the sweetest?

• 1M
• 3M
• 3.1M
• 2.5M

How many mL of 10.8M HCl are required to make 100.0 mL of 3.00M acid?

• 27.8 mL
• 27.78 mL
• 2.8 mL
• 278 mL

Calculate the molarity of the following solution:  1.0 mole of KCl in 750.0 mL of solution.

• 0.750 M
• 99 M
• 1.3 M
• 2.0 M

50 ml of a 1 M solution is diluted until the final volume is 80ml. How much water was added?

• 50 ml

• 1.3 ml

• 30 ml

• 130 ml

What volume, in milliliters, of 10.0 M NaOH is needed to prepare 300.0 mL of 2.00 M NaOH by dilution?

• 0.067 mL

• 60.0 mL

• 100 mL

• 125 mL

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO₃ to a volume of 250.0 mL?

• 15.9 M

• 0.636 M

• 0.642 M

• 1.59 M