Exam 2

Oxidation States

100

O₂

Zero

200

FeO

Oxygen =-2, Iron=+2

300

PO₄^3-

Oxygen=-2, Phosphorous=+5

400

HCO₃^-

Hydrogen= +1, Oxygen= -2, Carbon= +4

500

HSO₂-

Hydrogen= +1, Oxygen=-2, Sulfur= +2

Gases

100

What is the ideal gas constant?

R= 0.08206 (L*atm/Mol*K)

200

The volume of a container is increased, what happens to its internal pressure?

Pressure decreases.

300

The temperature of a sealed container increases, what happens to its internal pressure?

Pressure increases. 

400

What is the conversion factor between torr and atm?

1 atm = 760 torr = 760 mmHg

500

What is the total pressure of a container containing 3 different gases with partial pressures of 200 torr, 330 torr, and 230 torr?

1 atm = 760 torr

Stoichiometry

100

If it requires 4 eggs to make 5 pancakes, how many pancakes could 10 eggs make?

12.5 pancakes

200

If it requires 2mol of reactant to make 1 mol of product, how much product does 500 mols of reactant produce?

250 mol

300

Consider the following reaction

HCl+NaOH --> NaCl + H2O

How many mols of NaCl would 6.022E23 molecules of HCl produce?

1 mol

400

Consider the following reaction

Ca²⁺+2Cl^- --> CaCl₂

If the reaction produces 10 mols of CaCl₂, what initial amount (in mols) of Chloride ions was present?

20 mols

500

For the reaction of Aluminium cations reaction with Chloride cations, how many mols of Aluminum Chloride is produced from 6 mols of chloride ions and excess aluminum 

2 mols AlCl₃

Concentrations

100

3 mols of NaOh are dissolved in 1L of water. What is the concentration of the solution?

3 M NaOH

200

6 mols of HCl are dissolved in 2L of water, what is the concentration of the solution?

3 M HCl

300

2 mols of a substance are dissolved in 500mL of a solution, what is its concentration?

4 M

400

1 L of a 2.0 M HCl solution is combined with 1L of a 1.0 NaCl solution. What is the concentration of chloride ions in the combined solution?

1.5 M Cl-

500

2L of a 1.0 NaOH solution is mixed with 1L of a 1.0 M Na₂SO₄ solution. What is the concentration of Na+ ions in the combined solution? 

2.5 M NaCl

Solubility

100

What is the minority component of a solution?

Solute

200

Two aqueous solutions are combined and a solid is formed. What is the solid called?

Precipitate

300

Will the following solutions react to form a precipitate?

NaOH and HCl?

No

400

What happens when a solutions of AgNO₃ and KCl are mixed?

Solid AgCl forms

500

What happens when solutions of Calcium Sulfate and Lead (II) Acetate are mixed?

Solid PbSO₄ forms