Molarity & Dilutions

What is the molarity of 4 g of NaCl (FM=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 (FM = 58.45)?

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

Find the molarity of 186.55 g of sucrose, C₁₂H₂₂O₁₁ (FM = 342) in 250 mL of water.

• 2.18 M
• 0.746 M
• 1.18 M
• 0.545 M

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

Tags

NGSS.HS-PS1-5

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO₃ to a volume of 250 mL?

• 15.9 M
• 0.636 M
• 0.642 M
• 1.59 M

Tags

NGSS.HS-PS1-7

If you have 34 mL of a 0.5 M NaBr solution, what will the concentration be if 56 mL of water is added to it?

• .191 M

• 3.78 M

• .389 M

• 1.76 M

Drag the variables to the correct place in the formula

a

b

c

L of solution

Moles of solute

Molarity

Match the following terms to the correct definition

• Hydrogen bond

• The attraction of the slightly negative oxygen in a water molecule to the slightly positive hydrogen in a different water molecule

• Cohesion

• The substance that gets dissolved

• Solute

• The unequal sharing of electrons between hydrogen and oxygen atoms in a water molecule

• Adhesion

• When molecules stick to other substances

• Polar covalent bond

• When molecules stick to each other

When solute is added to a solution, the boiling point will (a)   , and the meting point will ​ (b)   . One way to increase the solubility of a solid is to ​ increase the (c)   . One way to increase the solubility of a gas in a liquid is to decrease the ​ (d)   .

• increase
• decrease
• surface area
• temperature
• stay the same
• pressure

Tags

NGSS.MS-PS1-4