Midterm 1: Ch 1-3
Midterm 2: Ch 4-5
Midterm 3: Ch 6-7
Chapter 8
Chapter 9
100

Classify as intensive or extensive:

mass

density

color

mass - extensive

density - intensive

color - intensive

100

How many unpaired electrons in N?

3 (1s2, 2s2, 2p3 <-- all three electrons in 2p are unpaired)

100

Which atoms follow the octet rule?

Period 2 atoms

100

Write the chemical reaction for the following statement: zinc and silver chloride react to form zinc chloride and silver

Zn + AgCl --> ZnCl2 + Ag

100

Is CaCl2 a weak electrolyte, strong electrolyte, or nonelectrolyte?

strong electrolyte (because it's an ionic compound!)

200

How many neutrons in the following symbol?

2713 Al

14

200

What kind of ion would an atom from Group 2 form? (Be specific)

A 2+ ion

200

What type of intermolecular forces are present in H2O?

dispersion, dipole-dipole, h-bonding

200

Balance the reaction

N2 + H2 --> NH3

N2 + 3 H2 --> 2 NH3

200
Is KOH an acid, a base, or neither?

A base according to the Arrhenius definition (Increases OH- concentration)

300

Draw a 2p orbital

∞

300

Which has the smallest atomic radius between K, Na, and Mg?

Mg

300

Name a molecular shape that is always polar.

bent, T-shape, square pyramidal, trigonal pyramidal, seesaw

300

Si + 2 Cl2 --> SiCl4

0.507 mole of SiCl4 is produced. How many moles of Cl2 were used?

1.014 mol Cl2

300

During the following reaction, a precipitate forms. What is it?

Pb(NO3)2 + 2 NaI --> 2 NaNO3 + PbI2 

PbI2 is insoluble, so is the precipitate

400
Give a set of four quantum numbers for a valence electron in Vanadium. n= l= ml= ms=

n=3   l=2   ml=-2, -1, 0, 1, or 2   ms=+/- 1/2

400

What is the name of this ionic compound? 

Li2SO3

Lithium Sulfite

400

How many lone pairs on the central atom in SO2? Is it polar or nonpolar?

one lone pair, it is polar.

400

What is the limiting reactant if you have 1 mole of CH4 and 2 moles of Cl2?

CH4 + 4 Cl2 --> CCl4 + 4 HCl

Cl2

400

In the following reaction, which atom is reduced?

2 Mg + O2 --> 2 MgO

O 

(oxidation # goes from 0 to -2)

500

If there are two charges that are +1 and -1 being held apart at a distance of d, how much greater is the Eel than the same charges being held apart at 2d?

(q1*q2)/d vs (q1*q2)/2d, so: 

2x greater

500

Which will have the greater lattice energy? RbCl or SrCl?

SrCl

500

What is the hybridization of the central atom when the electron domain geometry is trigonal bipyramidal?

sp3d

500

If the theoretical yield is 12.2 and the actual yield is 4.8, what is the percent yield?

39.3% (=4.8/12.2)

500

If you take a 1 mL of a 2.0 M solution and enough water to make 10 mL, what is the new concentration of the solution?

0.2 M

(Use M1V1=M2V2 where M is molarity and V is volume)

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