Chemistry

Colligative Properties

100

What do colligative properties depend upon?

the number of solute species present, not the identity of the solute species

200

What is the formula for boiling point elevation?

delta T_B= i x m x K_B

300

T or F? If a solution made with water has a boiling point elevation of 75 degrees Celsius, that means the solution boils at 75 degrees Celsius

False! The solution boils at 175 degrees!

400

In a given solution, the mole fraction of the solute is 0.4 and the vapor pressure of the pure solvent is 15mmHg. What is the vapor pressure of the solution?

0.6 x 15mmHg= 9mmHg

500

0.23 moles of NaCl is in 100g of water. What is the freezing point? The Kf of water is -1.86

2 x 2.3 x -1.86= -8.56 degrees Celsius 

Calculating [ ]

100

What is the formula for weight weight percent?

Mass fraction x 100%

200

You have 66g of NaCl, 92g of water, and the molar mass of NaCl is 58.5 g/mol. Calculate the solute and solvent mass fraction

Solute=0.4

Solvent=0.6

300

Calculate the molarity of a 100mL solution with 23 moles of solute and 500 moles of solvent

23/0.1= 230M

400

Calculate the molality of a solution with 40 moles of solute, and 70 moles of solvent which= 123 grams of solvent. 

40/0.123=325.2m

500

How many brains does a leech have?

32

Polyatomic Ions

100

What is the formula for a phosphate ion?

PO₄^3-

200

Name this polyatomic ion

CO₃^2-

Carbonate Ion

300

Approximately 60 circus performers have been shot from a cannon, how many of them have died according to this book?

thirty one

400

What is the formula for a hydronium ion?

H₃O⁺ 

500

What is this ion? MnO₄^-

permanganate ion

Acid Stuff

100

T or F? An acid is a special ionic compound that does not dissociate 

False! An acid is a special molecular compound that does dissociate

200

Name the following two acids: H₂S and H₂SO₄

Hydrosulfuric acid and Sulfuric acid

300

What does a horologist do?

measure time

400

What acid does not fit into either the binary or oxyacid category? Write the formula and spell out the name. 

HCN hydrocyanic acid

500

List all 7 strong acids

HCl, HBr, HI, H2SO4, HClO4, HNO3, HClO3

Hydrocarbons

100

What is an R group?

The hydrocarbon portion of an alcohol

200

As the hydrocarbon in an alcohol gets bigger, does the molecule become more or less polar?

Less polar

300

Name the hydrocarbon C₂H₆

Ethane

400

What was Goofy the dogs original name?

Dippy Dawg

500

What is the chemical formula for butane?

C₄H₁₀