Chemistry Part 2 Unit: 2 Quizes

Lesson 2.3 Starts AfterThis Card

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Lesson 2.6 starts after this card

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Lesson 2.5 Starts after this card

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Lesson 2.2 Starts AFter this Card

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What volume of a 6.0 mol/L sodium hydroxide solution is required to produce 3 L of a 1.5 mol/L solution? Select one: a. 5.2 L b. 0.25 L c. 0.75 L d. 3 L

0.75 L

The technique of adding salt or sand to roads to lower the freezing point of any water on the roads, thus preventing ice formation, is a great example of the chemistry concept of _____. Select one: a. freezing point depression b. boiling point elevation c. kinetic energy d. polar properties

freezing point depression

The air that we breathe is a good example of a/n _____ solution. Select one: a. polar b. aqueous c. solid d. gaseous

gaseous

Dissolving a solute is faster when the temperature is Select one: a. higher because there is less kinetic energy. b. higher because there is more kinetic energy. c. lower because there is less collisions between solvent molecules. d. lower because there is more kinetic energy.

higher because there is more kinetic energy.

If two siblings both have a cup of the same type of Nestles cocoa, but at very different temperatures, and one sibling complains that his cocoa won't dissolve, what is likely the problem? Select one: a. his cocoa isn't hot enough to dissolve the powder quickly b. his cocoa is too hot, and won't dissolve the powder quickly c. his cocoa isn't miscible in water, but the other's is

his cocoa isn't hot enough to dissolve the powder quickly

Alloys and salt water are examples of what type of mixture? Select one: a. aqueous b. heterogeneous c. homogeneous d. amalgam

homogeneous

When sodium chloride dissolves in water, the chloride ( - ) is attracted to the _____ atom/s of water. Select one: a. oxygen b. neither c. hydrogen

hydrogen

What is the name of the bond between the oxygen atom of one water molecule and the hydrogen atom of another water molecule? Select one: a. water bond b. hydrogen bond c. covalent bond d. ionic bond

hydrogen bond

Addition of common salt in water causes a/n _______. Select one: a. increase in melting point of solution b. decrease in boiling point of solution c. increase in boiling point of solution d. decrease in both melting point and boiling point

increase in boiling point of solution

The reason that agitation, which is shaking or stirring, helps things to dissolve more quickly is that you are physically increasing the _____ of the system when you do that. Select one: a. polarity b. concentration c. kinetic energy d. hydrogen bonding

kinetic energy

In the case of liquids, who has more surface area (given the same volume) ... more viscous liquids or less viscous liquids? Select one: a. less viscous liquids b. Surface area does not depend on viscosity. c. more viscous liquids

less viscous liquids

A drink in which two liquids are mixed evenly ( like sprite and orange crush) would be referred to as a/n ______ solution. Select one: a. hybrid b. alloy c. gaseous d. liquid

liquid

Which of the following pairs are immiscible? Select one: a. polar solute and polar solvent b. oil and water c. non-polar solute and non-polar solvent d. water and alcohol

oil and water

When sodium chloride dissolves in water, the sodium ( + ) is attracted to the _____ atom/s of water. Select one: a. oxygen b. neither c. hydrogen

oxygen

For each water molecule, what is the charge on the oxygen? The hydrogen? Select one: a. They are both negative ( - ) b. oxygen is positive ( + )hydrogen is negative ( - ) c. oxygen is negative ( - )hydrogen is positive ( + ) d. They are both positive ( + )

oxygen is negative ( - )hydrogen is positive ( + )

A water molecule is ____ . Select one: a. non-polar and bent b. non-polar and linear c. polar and linear d. polar and bent

polar and bent

Given two samples of liquid, one that is pure water and one that is salt water, which would require a lower temperature in order to freeze? Select one: a. they would freeze at the same temperature b. pure water c. salt water

salt water

For the following solubility curve, what region is represented by the point B? Select one: a. saturated b. supersaturated c. unsaturated

saturated

What volume of a 3 mol/L HCl solution is required to produce 45 L of a 2 mol/L solution? Select one: a. 42 L b. 9.9 L c. 30 L d. 7.5 L

30 L

What is the final concentration when 1.5 L of a 19.0 mol/L nitric acid solution is diluted to 3.9 L? Select one: a. 2.6 mol/L b. 10.9 mol/L c. 7.3 mol/L d. 3.4 mol/L

7.3 mol/L

From the diagram below, at 10° C, roughly how many grams of NH3 can be dissolved in 100 grams of H2O? Select one: a. 90 b. 100 c. 70 d. 45

70

From the diagram below, at roughly what temperature can 70 grams of NH4Cl be dissolved in 100 grams of H2O? Select one: a. 70° C b. 55° C c. 50° C d. 90° C

90° C

Which of the following do/does not change with the change in temperature? i. Mole fraction. ii. Molality. Select one: a. Neither of them b. Both i & ii c. only i d. Only ii

Both i & ii

What is true about particle size of the solute when it comes to dissolving? Select one: a. Larger surface areas decreases the rate of dissolving. b. The more viscuous (larger particle size) the solute, the more easily it is dissolved. c. Larger surface area increases the rate of dissolving. d. There is no relationship between particle size and rate of dissolving.

Larger surface area increases the rate of dissolving.

Water is required for life to exist.

TRUE

Dilute sodium chloride solutions are commonly used as IV fluids to treat nasal congestion. During a dilution, what happens to the concentration of a sodium chloride solution? Select one: a. The concentration decreases. b. The concentration depends on the nature of the solute. c. The concentration stays the same. d. The concentration increases.

The concentration decreases.

Only liquids and gases can be solutions.

FALSE

The concentration of solute in a solvent (high or low) has no impact on how much the boiling point or freezing point is changed by the solute.

FALSE

Water can dissolve only ionic compounds such as salt.

FALSE

When water dissolves sucrose (a sugar,) it breaks each individual sucrose molecule into its individual atoms, so they are no longer sucrose, but the atom components of the former sugar.

FALSE

Lesson 2.4 Starts after this card

It wont let me upload the graphs but if the question is the same then its probably the same answer

Which of the following statements explains why ionic and polar compounds dissolve in water? Select one: a. It has high surface tension. b. It does not have a charge. c. Its bonds are polar. d. It has a high specific heat capacity.

Its bonds are polar.

Which best describes a solution that contains 70g of NaNO3 at 30°C (in 100 mL H2O)? Consult the following solubility curve. Select one: a. saturated b. supersaturated c. cannot be determined d. unsaturated

unsaturated

Which would a chemist expect to change the freezing point of water more, 1 mol of sugar or 1 mol of NaCl ? (Hint: consider how many actual individual particles will be floating around for both sugar (not ionic) and NaCl (ionic) after being added to water.) Select one: a. Sugar b. NaCl c. They should change the freezing point of water by exactly the same amount.

NaCl

If you wanted to change how much (not how quickly) solute can be dissolved in a solvent, would it be best to raise the temperature, or stir the solution aggressively? Select one: a. Both would increase how much solute can be dissolved b. Raise the temperature c. Neither would increase how much solute can be dissolved d. Stir aggressively

Raise the temperature

All aqueous solutions have water as their solvent.

TRUE

Solutions can differ by what they are made of, but also by the varying concentrations of those components.

TRUE

Adding salt to a pot of water, in order to increase the temperature at which it boils, thus cooking pasta faster, is an excellent example of the chemistry concept of ______. Select one: a. heat of polarity b. freezing point depression c. boiling point elevation d. single replacement reactions

boiling point elevation

If a person wanted a solid to dissolve faster in a solvent, they would ______. Select one: a. crush it into smaller pieces b. continue to flip it, while it is in the solvent c. make sure that the solid does not crack or break

crush it into smaller pieces

When a solute is dissolved in water it causes a/n _____. Select one: a. decrease in freezing point of water b. increase in vapour pressure of water c. all of them d. decrease in boiling point of water

decrease in freezing point of water

Which of the following is NOT a characteristic of water? Select one: a. high heat capacity to help mammals thermo-regulate b. density increases when water freezes c. good solvent to dissolve various compounds d. bodily metabolism takes place in water

density increases when water freezes

What is the final concentration when 250 mL of a 16.0 mol/L nitric acid solution is diluted to 4.5 L? Select one: a. 8.90 mol/L b. 3.5 mol/L c. 0.89 mol/L d. 0.35 mol/L

0.89 mol/L

What volume of a 2.0 mol/L HCl solution is required to produce 2.8 L of a 1.3 mol/L solution? Select one: a. 8.1 L b. 1.8 L c. 4 L d. 0.35 L

1.8 L

From the diagram below, at 60° C, roughly how many grams of KNO3 can be dissolved in 100 grams of H2O? Select one: a. 50 b. 85 c. 110 d. 100

100

What volume of a 6.0 mol/L sodium hydroxide solution is required to produce 850 mL of a 0.100 mol/L solution? Select one: a. 7 mL b. 28 mL c. 21 mL d. 14 mL

14 mL

A teacher needs to prepare 4.5 L of 1.0 mol/L ehtanoic acid for an investigation. What volume of concentrated 17.4 mol/L ethanoic acid is required? Select one: a. 130 mL b. 260 mL c. 520 mL d. 65 mL

260 mL

What volume of a 3.5 mol/L HCl solution is required to produce 22.9 L of a 0.5 mol/L solution? Select one: a. 4.9 L b. 1.0 L c. 3.3 L d. 11.7 L

3.3 L

What is the final concentration when 0.5 L of a 15.0 mol/L LiCl solution is diluted to 2.3 L? Select one: a. 5.7 mol/L b. 9.1 mol/L c. 1.8 mol/L d. 3.3 mol/L

3.3 mol/L

The key difference between a solid that is in powder form (or in small pieces) and a solid that is in a large block, but with the same overall mass, is that the powder (or small pieces) has/have ______. Select one: a. a much smaller surface area b. higher polarity c. stronger non-polar bonds d. a much larger surface area

a much larger surface area

Which of the following is NOT an example of a solution? Select one: a. salt water b. air c. distilled water d. brass

distilled water

Brass, made up of different metals, is an example of a/n _____ solution. Select one: a. gaseous b. liquid c. solid d. volatile

solid

In a homogeneous mixture, what is the name of the dissolved substance? Select one: a. aqueous b. solute c. solution d. solvent

solute

Homogeneous mixtures can be thought of as having two major components; the ______ and the ______. Select one: a. ions, covalent bonds b. particles, crystals c. solvent, solute d. hallides, metalloids

solvent, solute

For the following solubility curve, what region is represented by the point A? Select one: a. unsaturated b. saturated c. supersaturated

supersaturated

What describes a solution that has more than the maximum amount of solute reached by heating? Select one: a. supersaturated b. unsaturated c. saturated d. desaturated

supersaturated

Colligative properties are properties that depend only on _______. Select one: a. the amount of particles dissolved b. the nature of the covalent bonds of the particles dissolved c. the polarity of the particles dissolved d. the chemical nature of the particles dissolve

the amount of particles dissolved

When an ionic compound, like sodium chloride, is added to water, ________. Select one: a. the ions float on the surface, repelled by water b. the individual ions pull apart and mix into the water c. the ions all clump together into one solid, because they are attracted

the individual ions pull apart and mix into the water

Given two samples of liquid, one made of pure water and one made of salt water, which would require a higher temperature to boil? Select one: a. the salt water b. the pure water c. they would boil at the same temperature

the salt water

For the following solubility curve, what region is represented by the point C?\ Select one: a. supersaturated b. saturated c. unsaturated

unsaturated

If a student drops a crystal of sodium chloride into an aqueous sodium chloride solution and the crystal dissolves entirely, what term best describes the original solution? Select one: a. saturated b. supersaturated c. heterogeneous d. unsaturated

unsaturated

On a solubility curve, any point under the curve would describe the solutions as Select one: a. unsaturated b. desaturated c. supersaturated d. saturated

unsaturated