CHEMISTRY REVIEW

Random

100

A negative delta G (Delta is the triangle) represents a spontaneous or non spontaneous reaction?

A negative delta G represents a spontaneous reaction

200

What type of IMf exists between water molecules?

Hydrogen Bonding

300

When you dissolve salt into water what happens to the boiling point?

The boiling point increases, it requires more energy to boil a pure substance or solution when you add in a solute.

400

A solution is 37% (m/m), how many grams of solute are in 200g of solution?

74 grams of solute 

500

Hydrogen bonding can only occur when a Hydrogen is bonded between which of three elements? 

ex: X---H----X, what do the X's need to be?

Oxygen, Nitrogen, Fluorine 

Kinetics

100

The rate constant in a reaction is depicted as what variable?

k

200

A graph of 1/[A] vs time yields a straight line. What order is the reaction?

the reaction is 2nd order

300

The graph of [A] vs time yields a straight line. What order is the reaction?

The reaction is 0 order

400

The graph of ln[A] yields a straight line. What order is the reaction?

1st order

500

What equation is used to determine the half life in a 1st order reaction (hint: this equation is also used during the nuclear chemistry section). AND for an extra 500 points. If the half life of a reaction is 25 seconds what is the rate constant?

t_1/2 = 0.693/k

k = .02772

Nuclear

100

Isotopes of an element have different numbers of what?

neutrons 

200

Uranium-235 has how many protons?

92

300

Grab a calculator and periodic table! A Barium -137 isotope has how many neutrons?

Ba-137 has 81 neutrons

400

Grab a calculator and periodic table! Uranium -235 has how many neutrons?

Uranium-235 has 143 neutrons

500

In nuclear chemistry the term mass defect is defined as what?

The mass of the nucleus of an atom is less than the sum of the protons and neutrons that make it.

Acids/Bases

100

What is the equation to easily convert from pH to pOH

14 = pH + pOH

200

Does an acid have a high pH of a low pH?

Acids have a low pH

300

Grab a calculator! is a solution has a [OH-] Concentration of .4M what is the pOH?

pOH = .398

400

Grab a calculator! If a solution has a concentration of [H+] of .05M what is its pH?

pH = 1.3

500

Grab a calculator! If an acidic solution has a pH of .52 what is the [OH-] concentration

[OH-] = 3.31*10^-14 M

Oxidation/Reduction

100

Group 1 Ions (meaning the first column of the periodic table) typically has what oxidation number?

+1

200

Group 2 Ions typically have what oxidation number?

+2

300

What does it mean if an atom is oxidized 

it means that the atom lost an electron(s)

400

What does it mean if an atom is reduced?

The atom gained an electron(s)

500

In oxidation/reduction reactions the acronym O.I.L R.I.G stands for what?

Oxidation Is Losing (electrons), Reduction Is Gaining (electrons)