Concentration Unit Practice

How many milliliters of concentrated 18M H₂SO₄ is needed to prepare 250 mL of a 6.0 M solution?

• 83.3 mL

• 0.033 L

• 1500 mL

• 1.5 L

What is a solvent?

• The substance that does the dissolving in a solution.
• The substance that is being dissolved in a solution.
• The mixing of different substances.
• The process in which neutral molecules lose or gain electrons

What is a substance that is dissolved in another substance? 

• solution
• solute
• solvent
• compound

A solution that is considered dilute would be....

• Dark in color
• Have a strong scent
• Have a large amount of solute
• Have a small amount of solute

When Koolaid mix is light colored and tastes watery it is a _______ solution.

• saturated 
• diluted

When a Koolaid mix in water is dark in color and very sweet it is a __________ solution.

• concentrated 
• Diluted

What is the molarity of ions in a 2 M solution of AlCl₃?

• 2 M Al³⁺ and 3 M Cl^1-
• 2 M Al³⁺ and 6 M Cl^1-
• 1 M Al³⁺ and 3 M Cl^1-
• 0.25 M Al³⁺ and 0.75 M Cl^1-

What is the molarity of ions in a 1.5 M solution of Ba(OH)₂?

• 3 M Ba²⁺ and 1.5 M OH^1-
• 1.5 M Ba²⁺ and 3 M O^2- and 3 M H^1-
• 1.5 M Ba²⁺ and 3 M OH^1-
• 1.5 M Ba²⁺ and 1.5 M OH^1-

How many grams of solid calcium hydroxide, Ca(OH)₂, are required to react with 350 mL of 0.40 M HCl?

2 HCl(aq) + Ca(OH)₂(s) --> CaCl₂(s) + 2 H₂O(g)

• 10.38 grams

• 2.62 grams

• 5.19 grams

• 0.4 grams

If 450.0 mL of 1.0 M NaOH reacts with 400 mL of a 0.5 M H₂SO₄, which reactant is the limiting Reagent and how many moles of H₂O will be produced? The balanced equation is:

H₂SO₄ + 2 NaOH --> Na₂SO₄ + 2 H₂O

• NaOH - 0.45 mol

• NaOH - 0.90 mol

• H₂SO₄ - .4 mol

• H₂SO₄ - .2mol