12-week SC111 Review

Geometry/ hybridization

100

The hybridization of CO₂

sp

200

Molecules that are predicted to have an sp3 hybridization are ______ in electron domain geometry

tetrahedral

300

Which would have the largest bond angle? OF₂, CH₄, NH₃?

CH₄

400

What is the molecular geometry of CO₃^2-?

trigonal planar

500

The molecular geometry of ClF₃

T-shape

Polarity, IMFs

100

Is C₂H₂ polar or nonpolar?

Non-Polar

200

Which ONE is capable of H-bonding as a pure liquid?
A) C₂H_6; B) HI; C) CH₃NH_2; D) CH₃COCH₃

C) CH₃NH₂

300

Why is CO₂ nonpolar but SO₂ polar?

CO2 linear - dipoles cancel

SO2 bent - dipoles don't cancel

400

Rank in order of boiling point from lowest to highest:
CH₃Cl, C₂H₆, CH₃OH

 C₂H₆, CH₃Cl, CH₃OH

500

The molecule with the highest boiling point out of the following: CH₄, AgCl, CH₃CH₂OH.

AgCl (ion-ion is strongest IMF!)

Stoichiometry

100

Balance the following equation:
 ___ N₂ + ___ F₂ -->  ___ NF₃

 ___ N₂ + __3_ F₂ -->  __2__ NF₃

200

N₂ + 3H₂ → 2NH₃, how many moles of hydrogen are needed to fully react with 2.5 mol nitrogen?

7.5 mol H₂

300

In the combustion reaction, what is the coefficient in front of O2?

__C₂H₆ + __ O₂ --> ___ CO₂ + __ H₂O

_2_C₂H₆ + _7_ O₂ --> _4__ CO₂ + _6_ H₂O

400

Balance the following equation
CO₂ + H₂O -->  C₆H₁₂O₆ + O₂

6 CO₂ + 6 H₂O -->  C₆H₁₂O₆ + 6 O₂

500

How many g of LiNO₃ are needed to react with excess PbSO₄ to produce 250 g of Li₂SO₄?
(LiNO₃ = 68.95 g/mol; Li₂SO₄ = 109.94 g/mol)

2LiNO₃ + PbSO₄ --> Li₂SO₄ + Pb(NO₃)₂

313.5g LiNO3

Solubility

100

Will (NH₄)₂CrO₄ dissolve in water?

Yes, all NH4+ compounds soluble

200

What solid forms when barium chloride reacts with sodium sulfate?

barium sulfate (BaSO4)

300

Compounds with what ions are always soluble (there are 3)

Group 1, NO3-, NH4+

400

BaSO₄, PbSO₄, Ag₂SO₄ and SrSO₄. What do these compounds have in common?

NONE are soluble in water

500

Calculate the mass of PbSO₄ (s) formed when 1.25 L of 0.0500 M Pb(NO₃)₂ (aq) is reacted with 2.00 L of 0.0250 M Na₂SO₄ (aq)

15.2g PbSO4

Molarity, Dilution, Titration

100

How should a concentration of 2 M be written when doing dimensional analysis?

2 mol / L

200

If I have a stock 2.00 M HCl, how much should I use to make a 1.00L 0.500 M solution?

0.25 L or 250 mL

300

How many grams are needed of sodium sulfate to make a 1.00 L 0.700 M soln.

99.4g NaNO3

400

How many mL of 1.42 M NaOH are needed to neutralize 0.0072 mol of H₂SO₄?

0.0101 L or 10.1 mL of NaOH

500

50.0mL of (?? M) NaOH was titrated with 35.2mL of 0.060M HCl to reach neutralization. What is the concentration of NaOH?

0.0422 M NaOH