Concentration (Types)- Molarity and Dilution

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

Concentration is

• the amount of solute in the solvent

• the amount of solvent in the solute

• density

• particle size

Tags

NGSS.HS-PS1-5

In order to dilute a solution, you need to

• add more of the solid

• add more water

• find the mass

• find the volume

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

What is the molarity of 4 g of NaCl (MM=58.45) in 3,800 mL of solution?

• 0.018 M
• 0.0011 M
• 1.052 M
• 0.062 M

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

Tags

NGSS.HS-PS1-7

What is the molarity of 4.0 g of NaCl (Molar mass=58.45) in 3,800 mL of solution?

• 0.018 M
• 0.001M
• 1.052 M
• 0.062 M

Molarity is

• moles per unit vol (mL)
• moles per unit vol (L)
• moles per unit vol (m³)
• moles per unit vol (mm³)

Tags

NGSS.HS-PS1-5

Calculate the mass percent of solution, if there is 100 g of sugar and 400 g of water

• 30

• 25

• 20

• 15

What is the concentration, in percent by volume, of 15.3 mL of solute in 2.65 L of solution?

• 0.58%
• 0.0058%
• 5.8%