Solutions Round MixturesCollig. Props Vocab.FormulasConc. Problems Solubility 100 200 300 400 500...

Solutions Round

Mixtures Collig.Props

Vocab. Formulas Conc. Problems

Solubility

100 100 100 100 100 100200 200 200 200 200 200300 300 300 300 300 300400 400 400 400 400 400500 500 500 500 500 500

Gases Round

Mixtures - 100

• Silver and gold is an example of which solute-solvent combination?

Answer: solid-solid

Random Points

400 points

Mixtures - 200

• This can be used to separate liquids that have different densities.

Answer: Centrifuge

Mixtures - 300

• What does not experience the Tyndall effect?

Answer: Solutions or homogeneous mixtures

Mixtures - 400

• Identify whether the following scenario describes a saturated, unsaturated or supersaturated solution.

• A single grain of solute is added to the solution, it sinks to the bottom of the container, and nothing else happens.

Answer: Saturated

Mixtures - 500

• A student is trying to determine if a liquid is a colloid, solution or suspension. The student cannot see through the mixture and the particles are not settling out. The liquid should be classified as a _______________________.

Answer: Colloid

Colligative Properties - 100

• A property that is determined by the number of particles present in a system but that is independent of the properties of the particles themselves.

Answer: Colligative Property

Colligative Properties - 200Which of the following is an example of using the

concept of boiling point elevation?a. Adding table salt in water to cook pastab. Adding rock salt on icy roadsc. Adding valve oil to a brass instrument during a Christmas parade to keep the valves from locking up.d. Adding ethylene glycol (antifreeze) to a car engine during the winter.

Answer: a

Colligative Property - 300

• To determine the melting point elevation, the concentration of the solution should be in:

Answer: Molality


Which of the following would have the greatest impact on the freezing point of water?a. glucose (C6H12O6)

b. strontium sulfide (SrS)c. lithium bromide (LiBr2)

d. sodium chloride (NaCl)

Answer: C

Daily Double


• Calculate the boiling point of a solution of 520 g of the ionic compound magnesium chloride, MgCl2, dissolved in 900 g of water. (kb of water is 0.51ºC/m and the normal boiling point of water is 100ºC)

Answer: 520g x 1mol/95.3g = 5.45 mol

Tb = KbmN = (0.51)(5.45/.900)(3) = 9.265ºC

100 + (9.265) = 109.3ºC

Vocabulary - 100

• In a solution, the substance that is dissolved.

Answer: Solute

Vocabulary - 200

• A water-soluble cleaner that can emulsify dirt and oil.

Answer: Detergent

Vocabulary - 300

• A compound that concentrates at the boundary surface between two immiscible phases (solid-liquid, liquid-liquid, or liquid-gas).

Answer: Surfactant

Daily Double

Vocabulary - 400

• The law that relates partial pressure of a gas to its solubility is ____________________.

Answer: Henry’s Law

Vocabulary - 500

• The random movement of microscopic particles suspended in a fluid is known as:

Answer: Brownian Motion

Formulas - 100

• What is symbolized by a capital M?

Answer: Molarity

Formulas - 200

• What does a small italicized m mean?

Answer: molality

Formulas - 300

• What is the formula to calculate the parts per million of a solution?

Answer: m = gsolute /gsolvent x 1000000Orm = masssolute /masssolvent x 1000000

Formulas - 400

• How is molality calculated?

Answer: moles divided by kilograms

Formulas - 500

• What is the formula used to calculate the change in freezing point.

Answer: Tf = kfmN

Concentration Problems - 100

• A sample of 1500.0 g of drinking water is found to contain 42 mg Pb. What is this concentration in parts per million?

Answer: 28 ppm

Random Points

300 points


• A solution contains 76.0 g of NaCl and has a volume of 550 mL. Find the molarity of the solution.

Answer: 2.36 M


• You need to make 200 mL of 0.25 M HCl. How much 6.0 M HCl would you need?

Answer: 8.33 mL (use M1V1=M2V2)


• How many grams of NaOH are required to prepare 1200 mL of a 0.50 M solution?

Answer: 24 g

0.50 = x/1.200 (M=mol/L)

x = 0.6 mol x 40g/1mol = 24 g


• Legally, the concentration of methyl mercury needs to be less than 1.0 ppm in fish meat to be sold or eaten. What is the maximum amount in milligrams of methyl mercury allowed in a fish that weighs 2.25 kg?

Answer: 2.25 mg

1.0 = x/2250 x 1000000

x = 0.00225 g x 1000 = 2.25 mg

Solubility - 100• Describe a condition that has an effect on

solubility.Answer: Temperature – increases solubility of solids and liquids, decreases solubility of gases,Agitation – increases solubility of liquids and solidsSurface area – the smaller the surface area, the greater impact on solubilityPolarity – has to be the same polarity to be soluble

Solubility - 200

• How can the solubility of a gas be increased?

Answer: Increase pressure, decrease temp, decrease agitation

Random Points

200 points

Solubility - 300• What chemical

has the most change in solubility as the temperature is changed from 0C to 100 C

Answer: NaC2H3O2 or sodium acetate

Solubility - 400

• At 10 °C, how much CsCl can be dissolved in 300 g of water?

Answer: about 513 g

171 x 3

Solubilty - 500

• At 90C, 30 g of Li2SO4 is dissolved in 100 g of water. Is this solution saturated, unsaturated, or supersaturated?

Answer: Unsaturated, because at 90C, water can hold 31 g of Li2SO4

Gases Round

Ideal Gases

Gas Laws Gas Law Problems

DiffusionConcepts

Misc. Vocab

200 200 200 200 200 200400 400 400 400 400 400600 600 600 600 600 600800 800 800 800 800 800

1000 1000 1000 1000 1000 1000

Ideal Gases - 200

What is the ideal gas law formula?

PV=nRT

Ideal Gases - 400

According to the diagram to the right, at what pressure do all the gases most resemble an ideal gas?

0 atm

Ideal Gases - 600

Calculate the approximate volume of a 2.50 mol sample of gas at -8.0°C and a pressure of 3.50 atm.

15.5 L

Ideal Gases - 800

A 10.5 L sample of a gas has a mass of 95.9 g at 7.6 atm and 35°C. What is the molar mass of the gas? (Hint: divide the given mass by n).

30.4 g/mol

Daily Double

Ideal Gases - 1000

2H2O(l) + electricity 2H2(g) + O2(g)

What mass of H2O is needed to create 15.64 L of O2, if the temperature is 25°C and the pressure is 1.2 atm?

27.6 g

Gas Laws - 200

What happens to the volume of a gas during compression?

The Volume Decreases

Gas Laws - 400Who developed the concept that the total

pressure of a mixture of gases is the sum of their partial pressures?

Dalton

Gas Laws - 600

Charles’s law is the direct relationship between ____________________ and volume.

Temperature

Gas Laws - 800

Who is accredited with the idea that in a reaction, two volumes of hydrogen gas will combine with one volume of oxygen gas to produce two volumes of water vapor?

Gay-Lussac

Gas Laws - 1000

The principle that under similar pressures and temperatures, equal volumes of gases contain the same number of molecules is attributed to ________________.

Avogadro

Gas Law Problems - 200

A mixture of gases with a pressure of 800.0 mm Hg contains 60% nitrogen and 40% oxygen by volume. What is the partial pressure of oxygen in this mixture?

320 mm Hg


A sample of oxygen occupies 350 mL when the pressure is 5 atm. At constant temperature, what volume does the gas occupy when pressure falls to 3 atm?

583 mL


T1 = 76 C P1 = 4 atm V1 = 560 mL

T2 = 92 C P2 = 2 atm V2 = ?

1171 mL

Daily Double


Nitrogen reacts with hydrogen to make ammonia [N2 (g) + 3H2 (g) --> 2NH3 (g)]. If one needs to produce 4 L of ammonia, how many liters of nitrogen are needed?

2 L


A sample of a gas has a pressure of 2.25 atm, a volume of 650 mL and a temperature of 36°C. What would the volume of the gas be if the pressure is increased to 3.20 atm and the temperature is decreased to 31°C?

449.6 mL

Random Points

500 points

Diffusion Concepts - 200

This is the passage of a gas under pressure through a tiny opening.

Effusion


The rate of diffusion of a gas depends on the ____________ of the gas.

Molar Mass


What scientist studied effusion in detail and determined that the rate of effusion is indirectly proportional to the square root of the molar mass of the gas, if pressure and temperature are kept constant.

(Thomas) Graham


To two decimal places, what will vA/vB be equal to if N2 is considered to be gas A and NO is considered to be gas B. (A diffusion problem)

1.03


What is the molar mass of a gas if it diffuses at a rate of 258 m/s while Iodine gas diffuses at 125 m/s at the same temperature?

29.7 g

Miscellaneous - 200

The average kinetic energy of random motion is proportional to the temperature in what unit?

Kelvin

Miscellaneous - 400

Standard temperature and pressure for a gas is ____________________

0°C (or 273 K) and 1 atm.

Random Points

300 points

Miscellaneous - 600

What is the SI unit of pressure?

Pascal

Miscellaneous - 800

A pressure of 165 kPa is equal to _____ atm.

(1 atm = 101325 Pa)

1.63

Miscellaneous - 1000

Line D represents water. If the atmospheric pressure in a flask is lowered to 70 kPa, water would boil at what temperature?

92 C

Vocabulary - 200

What does the constant bombardment of gas molecules against the inside of a container cause?

Pressure

Vocabulary - 400

The movement of particles from regions of higher concentrations to regions of lower concentration.

Diffusion

Random Points

800 points

Vocabulary - 600

A device used to measure pressure is called a ____________________.

Barometer

Vocabulary - 800

The pressure of each gas in a mixture is called the ____________________ pressure.

Partial

Vocabulary - 1000

What is the theory that explains that the behavior of physical systems depends on the combined actions of the molecules constituting the system?

Kinetic Molecular Theory

Solutions Round MixturesCollig. Props Vocab.FormulasConc. Problems Solubility 100 200 300 400 500...

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