Chemistry Final Semester 2 Test Part B

Why is water considered to be the "universal solvent"?

• Water is an effective solvent of both polar and nonpolar molecules.

• Water dissolves more chemicals, both inorganic and organic, than any other solvent.

• Water is the only solvent found in abundance throughout the universe.

• Water is an effective solvent in all three phases at standard pressure.

Tags

NGSS.HS-ESS2-5

Water makes up about 92 percent of blood plasma. Which of these describes the role of water in blood plasma?

• acts as an acid-base buffer

• filters out harmful particles

• provides an energy source for cells

• dissolves gases and electrolytes

A substance is classified as an electrolyte because —

• it has a high melting point.

• its aqueous solution has a pH value of 7.

• its aqueous solution conducts an electric current.

• it contains covalent bonds.

A change in pressure would have the greatest effect on the solubility of a —

• gas in a liquid.

• liquid in a solid.

• liquid in a liquid.

• solid in a liquid.

The solubility of a salt in a given volume of water depends primarily on the —

• rate at which the salt and water are stirred.

• surface area of the salt crystals.

• temperature of the water.

• pressure on the surface of the water.

Tags

NGSS.MS-PS1-4

At room temperature, the solubility of which solute in water would be most affected by a change in pressure?

• Methanol

• Sodium nitrate

• Carbon dioxide

• Sugar

Which of the following is a solution?

• sand

• concrete

• coffee

• chocolate cookie

Which barium salt is insoluble in water?

• Ba(ClO4)2

• BaCO3

• Ba(NO3)2

• BaCl2

What is the molarity of a solution containing 20 grams of NaOH in 0.50 liter of solution?

• 0.50 M

• 1.0 M

• 2.0 M

• 10 M

Which of the following is not a solute?

• coffee grounds

• Kool Aid powder

• food die in water

• paint thinner