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VSEPR theory
bonding/forces
math/balancing equations
acids/bases/ precipitate ion reactions
redox reactions and molarity
100

what is the difference between electron geometry and molecular geometry?

Electron geometry describes the arrangement of all electron pairs (both bonding and lone pairs) around a central atom, while molecular geometry describes the arrangement of only the bonded atoms around the central atom

100

what does the valence bond theory say

that atoms share electrons when atomic orbitals overlap

100

balance:

C2H4O2 + PCl3 = C2H3OCl + H3PO3

3C2H4O2 + PCl3 = 3C2H3OCl + H3PO3

100

what is a percipitate?

an insoluble product that forms from a solution

100

what is a redox reaction?

A redox reaction is the sum of an oxidation half-reaction and a reduction half-reaction.

Basically one atom loses and electron (oxidizes) and another atom gains an electron (reduces)

200

What is the bond angle in ClO4-?

109

200

what are intermolecular formulas?

they are the attractive forces between molecules

200

balance:

Fe + H2O = Fe3O4 + H2

3Fe + 4H2O = Fe3O4 + 4H2

200

what is the difference between the solute and the solvent?

the solute is the thing that is being dissolved and the solvent (present in the largest amounts) is doing the dissolving

200

what are the oxidation numbers of ClO3-?

Cl- +5

O- -2 (x3)

300

Predict the shape of SeH4

see-saw

300

define hydrogen bonding 

A special type of dipole-dipole interaction that occurs when a hydrogen atom is bonded to a highly electronegative atom (N, O, or F)

300

Consider the following reaction: 

 Al +  HBr →  AlBr3 + H3 

 When 3.22 moles of Al react with 4.96 moles of HBr, how many moles of H2 are formed?

2.15 moles

300

Bronsted acid v. Bronsted base

Bronsted acid- proton donor

Bronsted base- proton acceptor

300

25.0 mL of a 0.2450 M NH4Cl solution is added to 55.5 mL of 0.1655 M FeCl3 . What is the concentration of chloride ion in the final solution?

0.418 M

400

predict the shape of sulfate

tetrahedral

400

How many sigma and how many pi bonds are present in hexane?

19 sigma

400

Write the balanced equation for the reaction given below: 

CuCl2 + NaNO3  Cu(NO3)2 + NaCl 

If 15 grams of copper (II) chloride react with 20. grams of sodium nitrate, how much sodium chloride can be formed?

13.03 grams

400

Write the molecular, ionic, and net ionic equations for the reaction that occurs when aqueous solutions of lead acetate [Pb(C2H3O2)2] and calcium chloride
(CaCl2), are combined

Molecular: 

 Pb(C2H3O2)2(aq) + (CaCl2)(aq)= 

PbCl2(s)+ Ca(C2H3O2)2 (aq)

Ionic: 

Pb2+ (aq) + 2C2H3O2-(aq)+Ca2+(aq)+Cl2-(aq) = PbCl2(s) + Ca2+(aq) + 2C2H3O2-(aq)

Net Ionic:

Pb2+ (aq) + Cl2-(aq) = PbCl2(s)

400

What mass of Li3PO4 is needed to prepare 1000.0 mL of a solution having a lithium ion concentration of 0.247 M?

28.6 g

500

if a molecule has 6 domains, what is the electron geometry, hybridization, and bond angles?

octahedral, sp3d3, 90

500

what is orbital hybridization?

A concept in valence bond theory that explains the observed shapes of molecules. It involves the mixing of atomic orbitals within an atom to create hybrid
orbitals that have different shapes and energies than the original atomic orbitals

500

Starting with a 2.0 M stock solution of hydrochloric acid, four standard solutions (1 to 4) are prepared by sequential diluting 10.00 mL of each solution to 250.00 mL. Determine (a) the concentrations of all four standard solutions and (b) the number of moles of HCl in each solution.

D1: 8.00 x 10-2M , 2.00 x 10-2mol

D2: 3.20 x 10-3M, 8.00 x 10-4mol

D3: 1.28 x 10-4M, 3.20 x 10-5mol

D4: 5.12 x 10-6M, 1.28 x 10-6mol