AP Chem Review

Question 1

What is the total number of electrons in the correct Lewis dot formula of the sulfite ion?

Accepted Answer

26

Question 2

How many effective pairs are in a model with a trigonal bipyramidal structure?

Accepted Answer

5

Question 3

Which statement is false?

Accepted Answer

H is equal to E for the reaction 2H2+O2=2H2O

Question 4

Which one of the following violates the octet rule?

Accepted Answer

AsF5

Question 5

Which of the following pairs of elements and valence electrons is incorrect?

Accepted Answer

S-4

Question 6

What is the freezing point of water in Fahrenheit, Celcius, and Kelvin

Accepted Answer

32 F, 0 C, 273 K

Question 7

According to the Lewis theory, a base _____ .

Accepted Answer

makes available a share in a pair of electrons.

Question 8

Which of the following has dipole movement

Accepted Answer

NCl3

Question 9

When the system is A+B=C+D is at equilibrium_____

Accepted Answer

neither the forward nor the reverse reaction has stopped.

Question 10

What volume of 0.100 N HNO3 is required to neutralize 50.0 mL of a 0.150 N solution of Ba(OH)2?

Accepted Answer

75 ml

Question 11

How many protons are in a Sodium(Na) atom

Accepted Answer

11

Question 12

What is the pH of a solution composed of 0.20 M NH3 and 0.15 M NH4Cl?

Accepted Answer

9.38

Question 13

Which statement is incorrect?

Accepted Answer

For an endothermic process, H is negative.

Question 14

The number 0.005436 has how many significant figures?

Accepted Answer

5

Question 15

Which alkali metal has the largest atomic radii?

Accepted Answer

Cs

Question 16

The half-life of a first-order reaction_______

Accepted Answer

All of the above

Question 17

Which one of the following salts is insoluble?

Accepted Answer

BaCO3

Question 18

For the equation PV=nRT Which R constant is used

Accepted Answer

0.0821

Question 19

What type of reaction is this: 2NH3+ H2SO4= (NH4)2SO4

Accepted Answer

Synthesis

Question 20

In the Bronsted-Lowry system, a base is defined as:

Accepted Answer

a proton acceptor.

Question 21

What is the molecular geometry of BH3

Accepted Answer

Triangular planer

Question 22

The valence electrons of representative elements are

Accepted Answer

located in the outermost occupied major energy level.

Question 23

Which one of the following is a weak acid?

Accepted Answer

HF

Question 24

For a specific reaction, what can be said about K, the equilibrium constant?

Accepted Answer

It changes with changes in the temperature.

Question 25

Which one of the following is a strong electrolyte?

Accepted Answer

KF

Question 26

Which one of the following thermodynamic quantities is not a state function?

Accepted Answer

Work

Question 27

The chemical symbol for manganese is

Accepted Answer

Mn

Question 28

Which of the following combinations cannot produce a buffer solution?

Accepted Answer

HClO4 and NaClO4

Question 29

What alkaline earth metal is located in period 3?

Accepted Answer

Mg

Question 30

At what pH will Cu(OH)2 start to precipitate from a solution with [Cu2+] = 0.0015 M?

Accepted Answer

6.0

Question 31

If Kw is 2.9 x 10-15 at 10oC, what is the pH of pure water at 10oC?

Accepted Answer

7.27

Question 32

Which one of the formulas for ionic compounds below is incorrect?

Accepted Answer

Al3P2

Question 33

Which of the following will not be a product of this reaction: NaHCO3 + HCl

Accepted Answer

CO3

Question 34

The molar solubility of PbCl2 in 0.20 M Pb(NO3)2 solution is:

Accepted Answer

4.6 x 10-3 M

Question 35

Arrhenius defined an acid as:

Accepted Answer

a source of H+ ions in water.

Question 36

Which of the following can change without affecting the pressure of a gas in a system

Accepted Answer

Mass of gass

Question 37

What is the name of this compound: N2O4

Accepted Answer

Dinitrogen tetroxide

Question 38

How many moles of hydrogen gas is needed to yeild 10 moles of NH3 in the reaction: N2+3H2= 2NH3

Accepted Answer

15 moles of H2

Question 39

Identify the INCORRECT statement

Accepted Answer

Tap water: a compound

Question 40

Ag3PO4 would be least soluble at 25oC in

Accepted Answer

0.1 M AgNO3

Question 41

Which of the following is the strongest oxidizing agent?

Accepted Answer

Ag+

Question 42

What is the volume of a 2.50 g block of metal whose density is 6.72 grams per cubic centimeter?

Accepted Answer

0.372 cubic centimeters

Question 43

The number 10.00 has how many significant figures?

Accepted Answer

4

Question 44

What is the coefficient of CO2 when this reaction is balanced: C5H9O+ O2= CO2+ H2O

Accepted Answer

20

Question 45

The rate of reaction depends on

Accepted Answer

All of the above

Question 46

How many lone pairs are on the sulfur atom in SO3

Accepted Answer

1

Question 47

What is the hybridization of the oxygen atom in water?

Accepted Answer

sp3

Question 48

How many grams of Ca(OH)2 are contained in 1500 mL of 0.0250 M Ca(OH)2 solution?

Accepted Answer

2.78 g

Question 49

Which element has the highest electronegativity on the periodic table

Accepted Answer

F

Question 50

In the standard notation for a voltaic cell, the double vertical line "||" represents:

Accepted Answer

a salt bridge

AP Chem Review

Questions 50

AP Chem Review

Questions 50