Chemistry

Kinetics

100

What does it mean when a chemical reaction is at equilibrium?

When the forward and reverse reactions happen at the same rate, and the amounts of substances are the same.

200

How does concentration affect reaction?

Increasing concentration makes the reaction faster because there are more particles colliding.

300

N2(g) + 3H2(g) ⇌ 2NH3(g)    What happens to the equilibrium if more H2 is added?

Shift Right 

400

2KOH(aq) + H₂SO₄(aq) ⇌ 2H₂O(l) + K₂SO₄(aq) Answer beginning with K_eq = ____

 k_eq = [K₂SO₄] / [KOH]²[H₂SO₄]

500

2Al(s) + 3Cu²⁺(aq) ⇌ 2Al³⁺(aq) + 3Cu(s) Answer beginning with k_{eq = ____}

K_eq = [Al³⁺]² / [Cu²⁺]³

Periodic Trends

100

In a periodic table, what do you call it when you move left to right across the table?

Period

200

What is the name of the first group on the periodic table?

Alkali Metals

300

What is the most electronegative element in the periodic table?

Fluorine

400

Why does the atomic radius decrease when going down a group?

Shielding of electrons

500

What explains the general trend that metals lose electrons early while nonmetals tend to gain electrons during chemical reactions?

Metals have low ionization energy, making it easy to lose, and nonmetals have more electronegativity, making it easier to gain electrons.

Lewis Dot

100

What type of bond has a shared pair of electrons?

Covalent bond.

200

How many valence electrons are used in CH4?

Eight

300

How many lone pairs are in NH3?

One lone pair

400

What is the shape of CH4 and how many lone pairs does it have?

Tetrahedral, zero lone pairs.

500

Are molecules with symmetrical shapes always nonpolar?

No, they can be polar.

Molariy

100

What is the molarity of a solution with 2 moles of NaCl dissolved in 1 liter of water?

2M

200

You dissolve 0.5 moles of Helium in 2 liters of water, What is the molarity of the solution?

0.25M

300

How many moles of kBr are needed to make 500mL of a 1.5 M solution?

0.75 moles

400

What volume of 2M NaOH?

0.05 L

500

What mass of NaOH (molar mass = 40g/mol) is needed to make 150 mL of a 0.75 M solution?

4.5g

Electron Configuration

100

What is the electron configuration of Beryllium (Be)

1s²2s²

200

What are the 4 types of orbitals?

s, p, d, f

300

What is the Noble Gas Configuration of Xenon (Xe)

[Kr] 5s²4d¹⁰

400

What is the maximum amount of electrons in the "f" orbital.

14 electrons 

500

What is the electron configuration of Fe³⁺

1s²2s²2p⁶3s²3p⁶3d⁵