General Chemistry 1 (and a little 2) Final Review 1

Definitions & Concepts

100

Is saltwater a homogenous or heterogeneous mixture?

Homogeneous mixture

200

In a cation, are there more protons or electrons?

More protons

300

What is mass number?

Bonus (100 points): What is atomic mass?

Mass number = protons + neutrons

Bonus: Atomic Mass = avg mass of isotopes

400

What is an extensive property?

Depends on the amount of matter in the sample

500

Which one is an intensive property: volume or density?

density

Periodic Table Trends

100

Is silicon a metal, nonmetal, or metalloid?

Metalloid

200

What is the core charge of sulfur?

+6

300

Which has higher ionization energy: N or O?

N

400

Which is larger: Na or Na⁺?

Na

500

Give the FULL electron configuration of copper. 

Bonus (400 points): Draw the shell model, energy diagram, and photoelectron spectrum of copper. Then state if copper is paramagnetic of diamagnetic. 

1s²2s²2p⁶3s²3p⁶4s²3d⁹

Bonus: paramagnetic (for the rest, see image Lisa sent)

Chemical Bonding

100

Is NaCl ionic or covalently bonded? 

Ionic

200

Name N₂O₅

Dinitrogen pentoxide

300

Identify spectator ions: AgNO₃ + NaCl → AgCl + NaNO₃

Na⁺, NO₃^-

400

Find the formal charge on each atom in the nitrate ion, NO₃^- .

Nitrogen = +1, Double bonded Oxygen = 0, both single bonded oxygens = -1

500

Identify oxidizing agent: Zn + Cu²⁺ → Zn²⁺ + Cu

Cu²⁺

Math

100

How many significant figures are in 0.00450?

3

200

Balance: __Fe + __O₂ → __Fe₂O₃

4Fe + 3O₂ → 2Fe₂O₃

300

A solution is made by diluting 2.0 M to 0.50 M. If final volume is 1.0 L, what was the initial volume?

0.25 L

400

A compound is 75% C and 25% H. What is the empirical formula?

CH₄

500

Given 15.0g of Al and 40.0g of Cl₂, how many grams of AlCl₃ is formed? Bonus (100pts): How much excess is formed?

50.2g AlCl₃

Bonus: 4.86g Al excess

General Chemistry 2 Topics

100

What does a catalyst do?

Lowers activation energy

200

What does ΔG tell you?

Spontaneity

300

If K > 1, which side is favored?

Products

400

What is the pH of a 0.010 M HCl solution?

2.00

500

Given this equation: H₂(g) + I₂(g) ⇌ 2HI(g)

At a certain temperature, K_c = 50.0. A container initially has [H2]=0.200 M and [I2]=0.200 M. Find the equilibrium concentrations of all species.

[H2]=0.044M, [I2]=0.044 M, [HI]=0.312 M