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Acids and Bases
Equilibrium
Gases
Equations
Chemical Kinetics
100

Describe an acid according to the Lewis definition

A molecule that accepts a pair of electrons

100

What is Chemical Equilibrium?

Reactants form products as fast as products form reactants

100

Which is stronger, Hydrogen bonding or Dispersion force?

Hydrogen Bonding

100

? P + ? HNO3 + ? H2O → ? H3PO4 + ? NO

3, 5, 2, 3, 5

100

How do ions effect the boiling temperature of water?

They raise the boiling point by making it harder for water molecules to reach high enough activity to boil.
200

Which is not a potential Lewis Base?

1) NH3

2) H2O

3) CH4

4) CN-

3) CH4

Has no lone pair of electrons, or even electrons in general, to donate to an acid.

200

In AB + CD --> CB + AD + heat, which concentrations will increase when heat is added?

AB and CD

200

The density of a gas is 1.96 g·L-1 at 1.00 atm and 0 °C. What is the density of this gas at 0.855 atm and 25.0 C?

1.54

200

? Cr2O3 + ? KOH +? O2 → ? K2CrO4 + ? H2O

2, 8, 3, 4, 4

200

How does a catalyst affect chemical concentrations?

It doesn't

300

Which hydrated metal ion is most acidic under conditions of equal molar concentration in water?

(A) Al3+ (B) Ba2+ (C) K+ (D) Zn2+ (E) Ag+

(A) Al3+

Its small size as well as its high charge makes it very easy for the ion to detach a hydrogen from a water molecule

300

Given that 2X(g) + Y(g) --> 2Z(g) ∆H = –335 kJ, you will need ______ heat and _______ pressure to get the most concentration of Z possible.
(More/Less)

Less, More

Since the reaction is exothermic, less heat produces more product.
Since there are 3 moles on the reactant side and only 2 on the product side, more pressure will produce more product.

300

A 1200 mL sample of helium gas is at a pressure of 350 mmHg and a temperature of 300 K. What volume will this gas sample occupy if the pressure is increased to 700 mmHg and the temperature is increased to 400 K?

800mL

P*V/T=P*V/T

300

Why is the following incorrect? Mg3 + N2 → Mg3N2

Mg does not exist as Mg3, since it cannot react with itself. The correct reaction is:

3Mg + N2 → Mg3N2

300

What lowers the activation energy of a reaction?

A catalyst

400

Which of these is NOT a Lewis Acid-Base Reaction?
1) Cu2+ (aq) + 4NH3 (aq) --> [Cu(NH3)4]2+ (aq)

2) HCl(g) + NH3 (g) --> NH4Cl (s)

3) H+ + OH- --> H2O

4) 2Na (s) + Cl2 (g) --> 2NaCl (s)

4) 2Na (s) + Cl2 (g) --> 2NaCl (s)

There is no base with a lone pair, so this cannot be classified as a Lewis Acid-Base Reaction.

400

How much catalyst do you need (in grams) to produce more Ammonium in this solution?
N2 + 3H2 -->  2NH3   ∆H = –92 kJ

112g N2 
82g H2

None, a catalyst will not produce extra product

400

A sample of nitrogen at pressure P is contained in a sealed syringe with a movable piston. If the volume of the sample were doubled and the absolute temperature tripled, the new pressure of the gas would be ______ times the original.

1.5

2P x 2V/2T = XP x 4V/6T

X = 3

2 x 1.5 = 3

400

Which is the strongest oxidizing agent?

Na → Na+ + e–       2.71 V
Cd → Cd2+ + 2e–    0.40 V
H2 → 2H+ + 2e–     0.00 V
Ag → Ag+ + e–      –0.80 V

Na

The higher the voltage, the more likely it is to be reduced

400

Does a catalyst make a reaction more or less exothermic?

No effect

500

Which element in Group 5A forms the most basic oxide?

(A) N (B) P (C) As (D) Sb (E) Bi

(E) Bi

Bismuth is the only metal of the group, so it will be the only basic oxide

500

Chemical Equilibrium is ___________ reaction rate.
(Dependent upon, independent of, inverse to)

Independent of

500
This Mascot has 0 National Title and has been voted one of the worst in the SEC while the football team of this school has the most national titles of any school.

Who is Big Al?

500

What does isoelectronic mean?

The same number of electrons.

500

A catalyst lowers the activation energy of a reaction by...

Providing an alternate route for a chemical reaction to take place