Molarity

What is the molarity of a solution containing 4 moles of KCl in 2.5 L of solution?

• 1.6 M

• 0.63 M

• 10 M

• 2.6 M

What volume is needed to make a 2.45 M solution of KCl using 0.50 mol of KCl?

• 4.9 L

• 0.20 L

• 1.2 L

How many moles of NaCl are needed to make 5.25 L of a 0.25 M solution?

• 1.3 mol

• 21 mol

• 0.048 mol

How many grams of KCl would be dissolved in 5.50 L of a 0.250 M solution of KCl? *molar mass of KCl = 74.55 g/mol*

• 1.48 g

• 103 g

• 1640 g

• 3.39 g

What is the molarity of a solution made by adding 1.565 moles of PbNO₃ to 0.5 L?

• 300. M

• 31.3 M

• 3.13 M

• 1.56 M

Which solution is more concentrated?

Solution 1:

500 mL of water

100 g of salt

Solution 2:

500 mL of water

90 g of salt

• Solution 1

• Solution 2

• They have the same concentration

• I have no idea

Tags

NGSS.HS-PS1-5

Which solution is more diluted?

Solution 1:

1000 mL of water

60g of salt

Solution 2:

500 mL of water

60 g of salt

• Not enough information to tell

• Solution 1

• Solution 2

• They are equally diluted

Tags

NGSS.HS-PS1-5

What is the molarity of 4 grams of sodium chloride in 3,800 mL of solution?

• 0.018 M
• 0.018 mol
• 1.052 M
• 1.052 mol

What is the molarity of a solution which contains 22.41 grams of NaCl in 50.0 mL of solution?

• 0.488 M
• 7.67 mol
• 7.67 M
• 0.00767 M

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