How many moles of Na2CO3 are needed to react with 750 mL of 0.250 M H2SO4 solution? Na2CO3 + H2SO4 $\rightarrow$Na2SO4 + CO2 + H2O

A) 3.00* 103 B) 0.333 C) 1.33 D) 0.188 A) 3.00* 103 B) 0.333 C) 1.33 D) 0.188

Exam 7: Solutions and Colloids

Citric acid,a natural food preservative,accounts for the tartness of citrus fruits.It is shown below.About 730 g of this material can be dissolved in water,making a liter of solution.However,only about 1.5% of it dissociates.As such,it would be considered a _____.

(Multiple Choice)

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Question 21

The ability to see the scattering of light when passed through a colloid is known as

(Multiple Choice)

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Question 22

A salt sample is placed into some water and nearly all of it dissolves without stirring or heating.The resulting solution is

(Multiple Choice)

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Question 23

A solution is produced in which water is the solvent and there are four solutes.Which of the solutes can dissolve better if the solution is heated?

(Multiple Choice)

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Question 24

How many moles of Na₂CO₃ are needed to react with 750 mL of 0.250 M H₂SO₄ solution? Na₂CO₃ + H₂SO₄ $\rightarrow$ Na₂SO₄ + CO₂ + H₂O

(Multiple Choice)

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Question 25

In the colloid known as mayonnaise,the dispersed phase is _____ .

(Multiple Choice)

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Question 26

A solution is prepared by dissolving 4.66 g of KCl in enough distilled water to give 250 mL of solution.KCl is a strong electrolyte.How will the freezing point of the solution be different from that of pure water? (Note: K_f for water is 1.86°C/M.)

(Multiple Choice)

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Question 27

A solution is made by dissolving 5.84 grams of NaCl in enough distilled water to give a final volume of 1.00 L.What is the molarity of the solution?

(Multiple Choice)

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Question 28

The solubility of gases in water increases with increasing temperature.

(True/False)

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Question 29

When making some iced tea,you find that you can dissolve 100 grams of table sugar in a liter of tea at 20 ^oC.Based on this,what did you learn?

(Multiple Choice)

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Question 30

You want to remove as much CO₂ gas as possible from a water solution.Which of the following treatments would be most effective?

(Multiple Choice)

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Question 31

Changes in boiling point,freezing point,and vapor pressure are

(Multiple Choice)

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Question 32

Light scattering is an effective way to distinguish between true solutions and colloidal dispersions.

(True/False)

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Question 33

When will carbon dioxide in a carbonated soft drink dissolve best?

(Multiple Choice)

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Question 34

As NH₄NO₃ dissolves in water,the resulting solution becomes colder.Which of the following expressions is most correct?

(Multiple Choice)

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Question 35

Which of the following pass through both osmotic and dialysis membranes?

(Multiple Choice)

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Question 36

The solubility of a substance can be measured in grams substance dissolved per liter of water.This is the same as expressing solubility in moles per liter.

(True/False)

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Question 37

There is a 12 M aqueous HCl solution in the stock room,but a 6 M solution is required for an experiment.Doubling the volume of a 12 M sample with water will produce a 6 M solution.

(True/False)

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Question 38

How many grams of solid KCl are needed to prepare 250 mL of 0.235 M solution?

(Multiple Choice)

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Question 39

When a patient's blood electrolyte levels are evaluated,sodium,chloride and bicarbonate ions are commonly measured and the difference in the total positive and negative charges calculated.This difference is called the

(Multiple Choice)

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Question 40

Showing 21 - 40 of 87

Exam 7: Solutions and Colloids

Citric acid,a natural food preservative,accounts for the tartness of citrus fruits.It is shown below.About 730 g of this material can be dissolved in water,making a liter of solution.However,only about 1.5% of it dissociates.As such,it would be considered a _____.

The ability to see the scattering of light when passed through a colloid is known as

A salt sample is placed into some water and nearly all of it dissolves without stirring or heating.The resulting solution is

A solution is produced in which water is the solvent and there are four solutes.Which of the solutes can dissolve better if the solution is heated?

How many moles of Na2CO3 are needed to react with 750 mL of 0.250 M H2SO4 solution? Na2CO3 + H2SO4 →\rightarrow→ Na2SO4 + CO2 + H2O

In the colloid known as mayonnaise,the dispersed phase is _____ .

A solution is prepared by dissolving 4.66 g of KCl in enough distilled water to give 250 mL of solution.KCl is a strong electrolyte.How will the freezing point of the solution be different from that of pure water? (Note: Kf for water is 1.86°C/M.)

A solution is made by dissolving 5.84 grams of NaCl in enough distilled water to give a final volume of 1.00 L.What is the molarity of the solution?

The solubility of gases in water increases with increasing temperature.

When making some iced tea,you find that you can dissolve 100 grams of table sugar in a liter of tea at 20 oC.Based on this,what did you learn?

You want to remove as much CO2 gas as possible from a water solution.Which of the following treatments would be most effective?

Changes in boiling point,freezing point,and vapor pressure are

Light scattering is an effective way to distinguish between true solutions and colloidal dispersions.

When will carbon dioxide in a carbonated soft drink dissolve best?

As NH4NO3 dissolves in water,the resulting solution becomes colder.Which of the following expressions is most correct?

Which of the following pass through both osmotic and dialysis membranes?

The solubility of a substance can be measured in grams substance dissolved per liter of water.This is the same as expressing solubility in moles per liter.

There is a 12 M aqueous HCl solution in the stock room,but a 6 M solution is required for an experiment.Doubling the volume of a 12 M sample with water will produce a 6 M solution.

How many grams of solid KCl are needed to prepare 250 mL of 0.235 M solution?

When a patient's blood electrolyte levels are evaluated,sodium,chloride and bicarbonate ions are commonly measured and the difference in the total positive and negative charges calculated.This difference is called the

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How many moles of Na₂CO₃ are needed to react with 750 mL of 0.250 M H₂SO₄ solution? Na₂CO₃ + H₂SO₄ $\rightarrow$ Na₂SO₄ + CO₂ + H₂O

A solution is prepared by dissolving 4.66 g of KCl in enough distilled water to give 250 mL of solution.KCl is a strong electrolyte.How will the freezing point of the solution be different from that of pure water? (Note: K_f for water is 1.86°C/M.)

When making some iced tea,you find that you can dissolve 100 grams of table sugar in a liter of tea at 20 ^oC.Based on this,what did you learn?

You want to remove as much CO₂ gas as possible from a water solution.Which of the following treatments would be most effective?

As NH₄NO₃ dissolves in water,the resulting solution becomes colder.Which of the following expressions is most correct?