Solutions

When you make a dilution, which of these values remains constant?

• The molarity (M)

• The total moles of solute

• The volume (V)

• The concentration

How do we make a dilution?

• Add more solute

• Remove solute

• Remove solvent

• Add more solvent

A solution that has water as the solvent is called a(n).....

• Aqueous Solution

• Water-Based Solution

• Organic Solution

• Dilute Solution

What is the molarity of a solution containing 400 g of CuSO₄ (FM: 159.6 g/mol) in 4.0 L of solution?

• 100 M

• 1.6 M

• 0.626 M

• 0.01 M

How many mL of stock solution of 2M NaCl do you need to prepare 100 mL of 0.150M NaCl?

• 7.5 mL

• 15 mL

• 1333 mL

• 200 mL

You are adding a chlorine solution to a swimming pool. The stock solution of chlorine is 1000M. Your swimming pool (75,000 L) needs to be at a concentration of 0.1M. How much of the stock solution should you add?

• 7500 L

• .75 L

• 750 L

• 7.5 L

What is the molality of a solution made by dissolving 2 moles of NaOH in 400 grams of water?

• 5 mol/kg. solvent

• 4 mol/kg solvent

• 3 mol/kg. solvent

• 2.5 moles /kg solvent

molality is defined as ________________________

• the moles of solute per kilogram of solvent

• moles of solute per liter of solution

• mass of solute/ mass of solution

• mass of solute/ mass of solvent X 100

What is the mass of 0.75 moles of (NH₄)₃PO₄?

• 101.75 g
• 121.75 g
• 111.75 g
• 131.75 g

What do molarity and molality have in common?

• Both have "moles solute" in the numerator

• Both have "kg solvent" in the denominator

• Both have "L solution" in the denominator

• Both have "moles solution" in the denominator