What is the molarity of a solution if 300.0 mL of it contains 16.8 g of KNO3? [Formula weight: KNO3, 101.11 amu]

A) 5.53 × 10−4 M B) 0.056 M C) 0.166 M D) 0.554 M E) 5.66 M A) 5.53 × 10−4 M B) 0.056 M C) 0.166 M D) 0.554 M E) 5.66 M D

A solution contains the label 0.2 M KNO3.What is the correct interpretation of this concentration?

A) There are 0.2 moles of KNO3 in 100 mL of water. B) There are 0.2 g of KNO3 in 100 mL of solution. C) There are 0.2 molecules of KNO3 in 1 L of solution. D) There are 0.2 g of KNO3 in 1 L of water. E) There are 0.2 moles of KNO3 in 1 L of solution. A) There are 0.2 moles of KNO3 in 100 mL of water. B) There are 0.2 g of KNO3 in 100 mL of solution. C) There are 0.2 molecules of KNO3 in 1 L of solution. D) There are 0.2 g of KNO3 in 1 L of water. E) There are 0.2 moles of KNO3 in 1 L of solution.

A student mixes 4.0 g of KNO3 with 5.0 mL of water at room temperature, and observes that most, but not all, of the KNO3 has dissolved.Which statement concerning this solution is TRUE?

A) The solution is considered supersaturated, since no additional KNO3 will dissolve. B) The solution is considered unsaturated, since not all of the KNO3 dissolved. C) The solubility of KNO3 in water has been exceeded. D) KNO3 is a water insoluble ionic compound. E) In order to get the additional KNO3 to dissolve, the student can add more solute. A) The solution is considered supersaturated, since no additional KNO3 will dissolve. B) The solution is considered unsaturated, since not all of the KNO3 dissolved. C) The solubility of KNO3 in water has been exceeded. D) KNO3 is a water insoluble ionic compound. E) In order to get the additional KNO3 to dissolve, the student can add more solute.

Exam 6: Solutions

Vitamin D is essential for the normal development of teeth and bones.A tablet of Vitamin D is tested for its solubility in water and benzene.The results are shown in the table below.What is the most appropriate interpretation of the solubility results?

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(Multiple Choice)

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Question 1

Correct Answer:

Verified

What is the molarity of a solution if 300.0 mL of it contains 16.8 g of KNO₃? [Formula weight: KNO₃, 101.11 amu]

Free

(Multiple Choice)

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Question 2

Correct Answer:

Verified

Osmosis is the process that regulates the sodium/potassium ratio in living cells.

Free

(True/False)

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Question 3

Correct Answer:

Verified

False

What is the molarity of a solution that contains 4.50 mol of NaF dissolved in 750.0 mL of solution?

(Multiple Choice)

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Question 4

Cardiac arrest victims are sometimes treated by injection of a calcium chloride solution directly into the heart muscle.If 2.0 mL of a 5.0% (m/V) CaCl₂ solution is administered to a patient, what mass of CaCl₂ was provided?

(Multiple Choice)

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Question 5

The solubility of a solute is best described as which of the following?

(Multiple Choice)

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Question 6

Calculate the mass in grams of NaCl that is present in 500.0 mL of a 0.900% (m/V) solution.

(Multiple Choice)

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Question 7

Osmosis may be defined as the movement of a solvent through a semipermeable membrane from a region of higher solute concentration to one of lower solute concentration.

(True/False)

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Question 8

A solution that is 1 ppm contains more dissolved solute than one that is 1 ppt.

(True/False)

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Question 9

The solubility of gases in liquids increases with increasing pressure.

(True/False)

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Question 10

The solubility of KBr at 20°C is 60 g/100 g H₂O.Increasing the temperature of the solution will likely increase the solubility of KBr.

(True/False)

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Question 11

Calculate the molarity of 2.00 L of solution that contains 200.0 g of NaOH.[Formula weight: NaOH, 40.0 amu]

(Multiple Choice)

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Question 12

If 5.20 g of HCl is added to enough distilled water to form 3.00 L of solution, what is the molarity of the solution? [Molecular weight: HCl, 36.46 amu]

(Multiple Choice)

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Question 13

Which statement concerning solutions is FALSE?

(Multiple Choice)

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Question 14

What is the osmotic pressure of a 6.0 × 10^-2 M NaCl solution at 20°C (293 K)? [R=0.0821 L•atm/mol•K]

(Multiple Choice)

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Question 15

An aqueous solution containing a nonvolatile solute such as NaCl will have a freezing point above 0°C at 1 atm pressure.

(True/False)

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Question 16

A patient requires 100.0 g of glucose in the next 12 hours.What volume of a 5.0% (m/V) glucose solution should be administered?

(Multiple Choice)

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Question 17

A solution contains the label 0.2 M KNO₃.What is the correct interpretation of this concentration?

(Multiple Choice)

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Question 18

Na₃PO₄ dissolves in water to produce an electrolytic solution.What is the osmolarity of a 2.0 × 10^-3 M Na₃PO₄ solution?

(Multiple Choice)

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Question 19

A student mixes 4.0 g of KNO₃ with 5.0 mL of water at room temperature, and observes that most, but not all, of the KNO₃ has dissolved.Which statement concerning this solution is TRUE?

(Multiple Choice)

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Question 20

Showing 1 - 20 of 67

Exam 6: Solutions

Vitamin D is essential for the normal development of teeth and bones.A tablet of Vitamin D is tested for its solubility in water and benzene.The results are shown in the table below.What is the most appropriate interpretation of the solubility results?

What is the molarity of a solution if 300.0 mL of it contains 16.8 g of KNO3? [Formula weight: KNO3, 101.11 amu]

Osmosis is the process that regulates the sodium/potassium ratio in living cells.

What is the molarity of a solution that contains 4.50 mol of NaF dissolved in 750.0 mL of solution?

Cardiac arrest victims are sometimes treated by injection of a calcium chloride solution directly into the heart muscle.If 2.0 mL of a 5.0% (m/V) CaCl2 solution is administered to a patient, what mass of CaCl2 was provided?

The solubility of a solute is best described as which of the following?

Calculate the mass in grams of NaCl that is present in 500.0 mL of a 0.900% (m/V) solution.

Osmosis may be defined as the movement of a solvent through a semipermeable membrane from a region of higher solute concentration to one of lower solute concentration.

A solution that is 1 ppm contains more dissolved solute than one that is 1 ppt.

The solubility of gases in liquids increases with increasing pressure.

The solubility of KBr at 20°C is 60 g/100 g H2O.Increasing the temperature of the solution will likely increase the solubility of KBr.

Calculate the molarity of 2.00 L of solution that contains 200.0 g of NaOH.[Formula weight: NaOH, 40.0 amu]

If 5.20 g of HCl is added to enough distilled water to form 3.00 L of solution, what is the molarity of the solution? [Molecular weight: HCl, 36.46 amu]

Which statement concerning solutions is FALSE?

What is the osmotic pressure of a 6.0 × 10-2 M NaCl solution at 20°C (293 K)? [R=0.0821 L•atm/mol•K]

An aqueous solution containing a nonvolatile solute such as NaCl will have a freezing point above 0°C at 1 atm pressure.

A patient requires 100.0 g of glucose in the next 12 hours.What volume of a 5.0% (m/V) glucose solution should be administered?

A solution contains the label 0.2 M KNO3.What is the correct interpretation of this concentration?

Na3PO4 dissolves in water to produce an electrolytic solution.What is the osmolarity of a 2.0 × 10-3 M Na3PO4 solution?

A student mixes 4.0 g of KNO3 with 5.0 mL of water at room temperature, and observes that most, but not all, of the KNO3 has dissolved.Which statement concerning this solution is TRUE?

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What is the molarity of a solution if 300.0 mL of it contains 16.8 g of KNO₃? [Formula weight: KNO₃, 101.11 amu]

Cardiac arrest victims are sometimes treated by injection of a calcium chloride solution directly into the heart muscle.If 2.0 mL of a 5.0% (m/V) CaCl₂ solution is administered to a patient, what mass of CaCl₂ was provided?

The solubility of KBr at 20°C is 60 g/100 g H₂O.Increasing the temperature of the solution will likely increase the solubility of KBr.

What is the osmotic pressure of a 6.0 × 10^-2 M NaCl solution at 20°C (293 K)? [R=0.0821 L•atm/mol•K]

A solution contains the label 0.2 M KNO₃.What is the correct interpretation of this concentration?

Na₃PO₄ dissolves in water to produce an electrolytic solution.What is the osmolarity of a 2.0 × 10^-3 M Na₃PO₄ solution?

A student mixes 4.0 g of KNO₃ with 5.0 mL of water at room temperature, and observes that most, but not all, of the KNO₃ has dissolved.Which statement concerning this solution is TRUE?