Chapter 4 - Compounds and Stoichiometry

Question 1

What does the Avogadro’s Constant (N_A) amount to?

Answer 1

6.02 X 10²³ mol^-1

Question 2

What is equivalent in Acid-Base chemistry?

Answer 2

It is the number of moles of product, one mole of reactant will produce.

Question 3

What is gram equivalent weight?

Answer 3

it is the amount of compound, in grams, that will produce one equivalent of a particle of interest.

gram equivalent weight = molar mass/n

Question 4

What is normality (N)?

Answer 4

In acid-base chemistry, it is a concentration defined by:

equivalent/ L

Question 5

How do you find Molarity from normality?

Answer 5

Molarity = Normality/ n

Question 6

What is the difference between empirical formula and molecular formula?

Answer 6

the empirical formula is the simplest whole number ratio between elements in the compounds, whereas the molecular formula gives the exact number of each element in the compound.

Question 7

Name the following:

Fe²⁺

Fe³⁺

Answer 7

Ferrous (lesser)

Ferric (greater)

Question 8

Name the following:

Cu⁺

Cu²⁺

Answer 8

Cuprous (lesser)

Cupric (greater)

Question 9

Name the following:

H^-

F^-

O^2-

S^2-

N^3-

P^3-

Answer 9

Hydride, Fluoride, Oxide, Sulfide, Nitride, Phosphide

Question 10

Name the following:

NO₂^-

NO₃^-

Answer 10

Nitrite (less oxygen)

Nitrate (more oxygen)

Question 11

Name the following:

SO₃^2-

SO₄^2-

Answer 11

Sulfite (less oxygen)

Sulfate (More oxygen)

Question 12

Name the following:

ClO^-

ClO₂^-

ClO₃^-

ClO₄^-

Answer 12

• Hypo- less oxygen,*
• Hyper* written as per- more oxygen

Hypochlorite

Chlorite

Chlorate

Perchlorate

Question 13

Name the following:

HCO₃^2-

HSO₄^-

H₂PO₄^-

Answer 13

prefix bi- indicates addition of a single hydrogen ion

Hydrogen Carbonate or bicarbonate

Hydrogen sulfate or bisulfate

Dihydrogen phosphate

Question 14

Name the following:

NH₄⁺

C₂H₃O₂^-

CN^-

MnO₄^-

SCN^-

Answer 14

Ammonium

Acetate

Cyanide

Permanganate

Thiocyanate

Question 15

Name the following:

CrO₄^2-

Cr₂O₇^2-

BO₃^3-

Answer 15

Chromate

Dichromate

Borate

Question 17

Reversed Prompt

Ferrous (lesser)

Ferric (greater)

Answer 17

Name the following:

Fe²⁺

Fe³⁺

Question 18

Reversed Prompt

Cuprous (lesser)

Cupric (greater)

Answer 18

Name the following:

Cu⁺

Cu²⁺

Question 19

Reversed Prompt

Hydride, Fluoride, Oxide, Sulfide, Nitride, Phosphide

Answer 19

Name the following:

H^-

F^-

O^2-

S^2-

N^3-

P^3-

Question 20

Reversed Prompt

Nitrite (less oxygen)

Nitrate (more oxygen)

Answer 20

Name the following:

NO₂^-

NO₃^-

Question 21

Reversed Prompt

Sulfite (less oxygen)

Sulfate (More oxygen)

Answer 21

Name the following:

SO₃^2-

SO₄^2-

Question 22

Reversed Prompt

• Hypo- less oxygen,*
• Hyper* written as per- more oxygen

Hypochlorite

Chlorite

Chlorate

Perchlorate

Answer 22

Name the following:

ClO^-

ClO₂^-

ClO₃^-

ClO₄^-

Question 23

Reversed Prompt

prefix bi- indicates addition of a single hydrogen ion

Hydrogen Carbonate or bicarbonate

Hydrogen sulfate or bisulfate

Dihydrogen phosphate

Answer 23

Name the following:

HCO₃^2-

HSO₄^-

H₂PO₄^-

Question 24

Reversed Prompt

Ammonium

Acetate

Cyanide

Permanganate

Thiocyanate

Answer 24

Name the following:

NH₄⁺

C₂H₃O₂^-

CN^-

MnO₄^-

SCN^-

Question 25

Reversed Prompt

Chromate

Dichromate

Borate

Answer 25

Name the following:

CrO₄^2-

Cr₂O₇^2-

BO₃^3-