InvChem Semester 2

Unit 9

100

If the pH is 2.11 is the solution acidic, basic or neutral?

acidic

200

Is HCl an acid or a base?

acid

300

What is the molarity of 4 L of solution made from 3.4 moles of NaCl and water?

.85 M

400

What is the molarity of 0.5 L of solution and 8 grams of NaCl?

0.26 M

500

Solve for the unknown concentration:

[OH⁻] = 6.9 x 10⁻⁴ M [H⁺] = ?

1.45 x 10^-11 M

Unit 10

100

What is Boyle's Law

P₁V₁=P₂V₂

200

How is Celsius convert to Kelvin?

K = ⁰C + 273.15

300

The SI unit for pressure is...

Pascal

400

Write and label all part of the ideal gas law.

PV=nRT

P= pressure in atm or pascal

V= volume in liters

n= moles

R= gas constant

T= temperature in Kelvin

500

Using the Ideal Gas Law: How many moles of gas does it take to occupy 120 L at a pressure of 2.3 atmospheres and temperature of 340 K?

9.89 moles

Unit 11 & 12

100

If a hydrocarbon is made up of 1 hydrogen and only single bonds what is its name?

Methane

200

How many neutrons are in Carbon-14?

8 neutrons

300

If ΔH is written as a reactant is it endothermic or exothermic?

Endothermic because it is positive

400

What is the equation for specific heat, labeled properly.

q=mcΔT

    q = energy

    m= mass (g)

    c = specific heat

    ΔT = change in temp (final-initial)

500

The half-life of Zn-71 is 2.4 minutes. If was 100g at the beginning, how many grams would be left after 7.2 minutes has elapsed?

12.5 grams

Unit 13

100

What is the oxidation number of O₂?

0

200

What is the oxidation number of Ag in AgCl?

+1

300

If electrons are written as a product is it an oxidation or reduction?

Oxidation

400

What is the purpose of a salt bridge?

To allow ions to go between the half-cell reactions

500

Is Cl oxidized or reduced in this reaction?

H₂O + NaCl → NaOH + Cl₂

Oxidation

goes from a -1 to 0 in oxidation number

Unit 14,15 & 16

100

If the Keq is below 1 are the reactants or the products favored?

reactants are favored

200

In fried food which type of batter doesn't have to be fried as long as the other. 

Water based or Alcohol based?

Alcohol based batters

300

Convert 30 grams to tablespoons

2 tablespoons

400

Increase the amount of reactants in a system at equilibrium will shift it to the left or right?

To the left (towards reactants)

500

What are the 4 Rs?

Reduce

Reuse

Recycle

Recover