Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Final Exam on General Chemistry | CHEM 201, Exams of Chemistry

Material Type: Exam; Professor: Rettich; Class: General Chemistry; Subject: Chemistry; University: Illinois Wesleyan University; Term: Fall 2008;

Typology: Exams

Pre 2010

Uploaded on 12/12/2009

anagaval
anagaval 🇺🇸

4

(1)

3 documents

1 / 8

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Chem 201 Name (PRINT!) KEY
Final Exam December 9, 2008
1. (23 pts) Fill in the blank with the best answer.
Hybrid atomic orbitals named are used by the central atom when it has 3
regions of electron density in the Lewis dot diagram.
An aldehyde would react with dichromate ion to yield the organic functional group called
(Be as specific as possible.)
A ketone would react with sodium borohydride to yield the organic functional group
(Be as specific as possible.)
63
Cu
2+
has protons, electrons, and neutrons.
T, V, E, and H are examples of functions, while q and w are
examples of functions.
The quantum number n is called the quantum number; one of the names
of l is the quantum number.
Oxides of metalloids are most likely to dissolve in solution described as
(acidic/basic/either acidic or basic).
The energy released when a neutral gas phase atom gains an electron is called its
Of the salts LiF, NaCl. and KBr, the one having the largest value for lattice energy would
be .
2. (12 pts) Name the following compounds
Sr3(PO3)2
W(ClO3)3
Hg2(C2H3O2) 2
H3AsO3 (aq)
/35
Chem 201 A Final Exam, p 2 Name
pf3
pf4
pf5
pf8

Partial preview of the text

Download Final Exam on General Chemistry | CHEM 201 and more Exams Chemistry in PDF only on Docsity!

Chem 201 Name (PRINT!) KEY

Final Exam December 9, 2008

  1. (23 pts) Fill in the blank with the best answer.

Hybrid atomic orbitals named are used by the central atom when it has 3

regions of electron density in the Lewis dot diagram.

An aldehyde would react with dichromate ion to yield the organic functional group called

(Be as specific as possible.)

A ketone would react with sodium borohydride to yield the organic functional group

(Be as specific as possible.)

63

Cu

2 + has protons, electrons, and neutrons.

T, V, E, and H are examples of functions, while q and w are

examples of functions.

The quantum number n is called the quantum number; one of the names

of l is the quantum number.

Oxides of metalloids are most likely to dissolve in solution described as

(acidic/basic/either acidic or basic).

The energy released when a neutral gas phase atom gains an electron is called its

Of the salts LiF, NaCl. and KBr, the one having the largest value for lattice energy would

be.

  1. (12 pts) Name the following compounds

Sr 3 (PO 3 ) 2

W(ClO 3 ) 3

Hg 2 (C 2 H 3 O 2 ) (^2)

H 3 AsO 3 (aq)

Chem 201 A Final Exam, p 2 Name

  1. (6 pts) Give an acceptable name for each of the following

O

OH

HO

NH 2

O

  1. (4 pts) Draw the structure (similar to those in #3) for each of the following

methyl butanoate

cyclohexanone

  1. (10 pts) A photon with energy of 2.50 x 10

    Joules has 

Chem 201 A Final Exam, p 4 Name

  1. (27 pts) Calculate the values of N, A, and S for each of the following. Then write an

acceptable Lewis dot diagram, using o or x to represent every valence electron. If

resonance occurs, only one of the forms need be shown. Then indicate the electronic

geometry around the central atom, and the overall molecular geometry.

SF 2 N = A = S =

Hybrid orbitals for S =

Electronic geometry =

Molecular geometry = b

TeF 5

N = A = S =

Hybrid orbitals for Te =

Electronic geometry =

Molecular geometry =

IF 4

N = A = S =

Hybrid orbitals for I =

Electronic geometry =

Molecular geometry =

Chem 201 A Final Exam, p 5 Name

  1. (18 pts) (a) Write the formation reaction of gaseous butane (i.e., the reaction whose

molar enthalpy change is termed

ΔHf

o )

(b) Write the balanced combustion reaction of one mole of butane gas with oxygen gas to

form carbon dioxide gas and liquid water.

The molar enthalpy change of combustion of butane

ΔHcombustion

o is -2878 kJ/mole.

The

ΔHf

o of carbon dioxide gas is -393.5 kJ/mole, and the

ΔHf

o of liquid water

is -285.83 kJ/mole. Calculate the value of

ΔHf

o for butane gas.

Chem 201 A Final Exam, p 7 Name

  1. (25 pts) You must show all your work and prove any assumptions! Showing the

results in the form of a table is strongly encouraged. Assuming complete reaction, how

many moles remain at the end of the reaction for each reactant and each product when

40.00 g of phosphorous, 75.00 g of barium hydroxide, 20.00 g of water, and 15.00 g of

sulfuric acid are reacted according to the reaction:

2 P 4 + 3 Ba(OH) 2 + 6 H 2 O + H 2 SO 4

__

3 BaSO 4 + 6 H 3 PO 2 + 2 PH 3

Chem 201 A Final Exam, p 8 Name

  1. (16 pts) The electron in a hydrogen atom moved from the n=3 to the n=5 orbit. The

photon associated with this transition is absorbed (absorbed/emitted).

Calculate the wavelength, in nm, of this photon.

  1. (16 pts) A cup (heat capacity 15.0 J/K) and the sample of 25.0 g of water (specific

heat 4.18 J/g K) the cup contained were both initially at a temperature of 21.

o C.

A 50.0 g piece of lead, initially at a temperature of 175.

o C, was added to the water and

cup. The final common temperature was 28.

o C. What is the specific heat of lead?