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Exam 8: Solutions

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Question 51

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Since living cells are surrounded by biological solutions separated by a semipermeable membrane,the osmotic pressure must be higher in the cell than outside the cell membrane.

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Question 52

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Which of the following statements concerning solution concentration is NOT true?

A) An unsaturated solution contains less than the maximum amount of solute that can be dissolved in the solvent.
B) A saturated solution contains more than 100 g of dissolved solute.
C) A solution can be made less concentrated by adding additional solvent.
D) The number of moles of solute present in exactly one liter of solution is referred to as the solution's molarity.

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Question 53

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When two substances form a solution,the substance present in the lesser amount is called the ________,and the substance present in the larger amount is the ________.

Ringer's solution is an aqueous solution of NaCl,KCl,and CaCl₂ that is used for treating burns and wounds. The solvent in this solution is ________.

When calculating the concentration of a solution in units of parts per million,the "parts" must be expressed in units of grams.

Sodium chloride is soluble in nonpolar solvents such as octane (C₈H₁₈).

A particular wine contains 11.2% (v/v) ethanol. What volume of ethanol is in a 750.-mL bottle of this wine?

Which ionic compound is not soluble in water?

If cells are placed in a hypertonic solution,________.

What is the molarity of a 25.0% (v/v) aqueous isopropyl alcohol solution? The density of isopropyl alcohol (C₃H₈O,molar mass 60.09 g/mol) is 0.786 g/mL.

A flask contains two compartments (A and B) with equal volumes of solution separated by a semipermeable membrane. Which diagram represents the final level of the liquids if A is initially a 10% (w/v) glucose solution and B is initially a 20% (w/v) glucose solution?

In solution formation,solvation always releases more energy than that required to separate particles,so the overall process is always exothermic.

Dilution involves adding additional ________ to a solution in order to decrease the concentration of the ________.

Red Blood Cells are placed into a solution,and the cells begin to swell in a process called hemolysis. How should the solution be classified?

Which of the following describes an unsaturated solution?

A nonvolatile solute makes it harder for solvent molecules to form a crystalline solid,thus decreasing its melting point.

If the attractive forces between the ions and water are stronger than the attraction between the ions in the crystal,an ionic compound dissolves in water.

What is the concentration of a solution formed by adding 65.0 mL of water to 25.0 mL of a 3.2 M NaCl solution?