Chem chap 9

How many equivalents are in 0.40 mole of K+?

0.40 equivalent

The molarity of a solution of 5.0 g of KCl in 100. mL of solution is ________

0.67 M

What volume of 0.10 M NaOH can be prepared from 250. mL of 0.30 M NaOH?

0.75 L

How many moles of CaCl2 are in 250 mL of a 3.0 M of CaCl2 solution?

0.75 mole

Which solution is isotonic to a red blood cell?

0.9% NaCl

How many equivalents are in 0.60 mole of Mg2+?

1.2 equivalents

What is the molarity of a solution that contains 17 g of NH3 in 0.50 L of solution?

2.0 M

What is the new mass/volume percent (m/v) of a KOH solution that is prepared by diluting 110 mL of a 6.0% (m/v) KOH solution to 330 mL?

2.0%

What is the molarity of a solution which contains 58.5 g of sodium chloride dissolved in 0.500 L of solution?

2.00 M

What volume of a 2.00 M KCl solution is required to prepare 500. mL of a 0.100 M KCl solution?

25.0 mL

What is the concentration, in mass percent (m/m), of a solution prepared from 50.0 g NaCl and 150.0 g of water?

25.0%

What volume of 2.5% (m/v) KOH can be prepared from 125 mL of a 5.0% KOH solution?

250 mL

How many milliliters of a 25% (m/v) NaOH solution would contain 75 g of NaOH?

3.0 x 10^2 mL

Rubbing alcohol is 70.% isopropyl alcohol by volume. How many mL of isopropyl alcohol are in a 1 pint (473 mL) container?

330 mL

For the following question(s), consider a 4% starch solution and a 10% starch solution separated by a semipermeable membrane. Which starch solution will decrease in volume as osmosis occurs?

4%

200. mL of a 12.0% (m/v) NaCl solution is diluted to 600. mL. The new concentration is ________ %.

4.00 %

A solution which has 12 g of solute dissolved in 200.mL of solution has a m/v concentration of ________.

6.0%

A 2.0% (m/v) NaCl solution contains ________ g NaCl in 300. mL of solution.

6.0g

A red blood cell will undergo crenation in

7% NaCl

How many grams of glucose are needed to prepare 400. mL of a 2.0%(m/v) glucose solution?

8.0 g

Which of the following molecules can form hydrogen bonds?

NH3

Water is a polar solvent and hexane (C6H14) is a nonpolar solvent. Which of the following correctly describes the solubility of the solute in the given solvent?

NaHCO3, soluble in water

For the following question(s), consider a 4% starch solution and a 10% starch solution separated by a semipermeable membrane. Which of the following also occurs in this system?

There is a net flow of water from the 4% starch solution into the 10% starch solution

For the following question(s), consider a 4% starch solution and a 10% starch solution separated by a semipermeable membrane. Which of the following also occurs in this system?

There is a net flow of water from the 4% starch solution into the 10% starch solution.

A homogeneous mixture that does not settle out upon standing is

a colloid

The solubility of KI is 50 g in 100 g of H2O at 20 °C. If 110 grams of KI are added to 200 grams of H2O,

a saturated solution will form.

An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed in a dialysis bag and immersed in distilled water. Which of the following correctly describes the location of the indicated substance after dialysis?

albumin inside

A hydrogen bond is

an attraction between a hydrogen atom attached to N, O, or F and an N, O, or F atom.

In a solution, the solvent

can be a solid, liquid, or gas.

A ________ will pass through a filter but not a semipermeable membrane.

colloid

The process by which a semipermeable membrane allows water molecules, small molecules, and ions to pass through while retaining large particles is called

dialysis

A substance that carries an electric current when dissolved in water is called a(n) ________.

electrolyte

Using a kidney machine to remove waste products from the blood is known as ________.

hemodialysis

When 2.0 moles of KCl is dissolved in 1.0 L of water, the boiling point of the solution will be ________ the boiling point of pure water.

higher than

A solution that has an osmotic pressure less than that of red blood cells is called

hypotonic

According to Henry's law, the solubility of a gas in a liquid

increases as the gas pressure above the liquid increases

When MgO is added to water, the salt will be ________.

insoluble

A solution with the same osmotic pressure as the blood is

isotonic to the blood

A solution made from 1.0 mole of NaCl (a strong electrolyte) dissolved in 1.0 L of water will have a ________ melting point than a solution made from 1.0 mole of glucose (a nonelectrolyte) dissolved in 1.0 L of water.

lower

When 1.0 mole of NaCl is dissolved in 1.0 L of water, the melting point of the solution will be ________ the melting point of pure water.

lower

The number of moles of a compound dissolved in one liter of a solution is called the ________.

molarity

For the following question(s), consider a 4% starch solution and a 10% starch solution separated by a semipermeable membrane. The process that occurs in this system is

osmosis.

The O-H bond in water is polar because

oxygen is much more electronegative than hydrogen.

When some of the sugar added to iced tea remains undissolved at the bottom of the glass, the solution is

saturated

When KCl is added to water, the salt will be ________.

soluble

The compound KOH is

soluble, because all compounds containing K+ are soluble.

In the process known as osmosis, ________ moves through a semipermeable membrane into an area of ________ concentration.

solvent, lower solvent

In water, a substance that ionizes completely in solution is called a

strong electrolyte

An equivalent is

the amount of ion that carries 1 mole of electrical charge.

A red blood cell will undergo hemolysis in

water.