2020 Mod 9

Question 1

In general what are the properties of acids?

Answer 1

Acid taste sour.

Acid are covalent compounds that conduct electricity when added to water.

Acid turn blue litmus paper red

Question 2

In general what are the characteristics of basis

Answer 2

Bases taste bitter.

Bases are slippery to the touch when dissolved in water.

Bases turn red litmus paper blue

Bitter bases are blue

Question 3

What is the definition of an acid

Answer 3

An acid is A molecule that donates protons or H positive ions

Question 4

What is the definition of a base?

Answer 4

The base is a molecule that excepts protons or H positive ions

Question 5

Some books define a base as a proton acceptor. Why is this just as correct a definition as one as the one presented in this book.

Answer 5

Because bases except protons or H positive ions

Question 6

Hydrochloric acid

Answer 6

HCl

Question 7

Hydrobromic acid

Answer 7

HBr

Question 8

Hydrofluoric acid

Answer 8

HF

Question 9

Nitric acid

Answer 9

HNO3

Question 10

Sulfuric acid

Answer 10

H2SO4

Question 11

Phosphoric acid

Answer 11

H3PO4

Question 12

Carbonic acid

Answer 12

H2CO3

Question 13

Acidic acid

Answer 13

C2H4O2

Question 14

What unit conversions can be used as concentration units

Answer 14

Grams over meters cubed

moles over milliliter

Question 15

A chemist wants to make a solution of 3.4 M HCl. He can find two solutions of HCl on the shelf. One has a concentration of 6.0 M, while the other is a concentration of 2.0 M. Which solution can the chemist use to make the desired acid?

Answer 15

The one with the higher concentration 6.0 M

Question 16

Amphiprotic compounds

Answer 16

Compounds that can act as either an acid or a base, depending on the situation

Question 17

What is an indicator

Answer 17

A substance that turns one color in the presence of an acid in another color in the presence of a base

Question 18

What is titration

Answer 18

The process of slowly reacting a base of unknown concentration with an acid of known concentration (or vice versa) until just enough acid has been added to react with all of the base. this process to determine the concentration of the unknown base or acid.

Question 19

If you take an H what is left?

Answer 19

A negative compound

Question 20

What two molecules are important to remember?

Answer 20

H equals +1

OH equals -1

Question 21

What happens to ionic compounds when they dissolve

Answer 21

They split into their constituent Ions

Question 22

Polyprotic acid

Answer 22

An acid that can donate more than one H+ ion

Question 23

Covalent bases reactions

Answer 23

Covalent bases except only one H+ ion. Diprotic and triprotic acids require more than one covalent best to except their H+ ions.

Question 24

Molarity

Answer 24

The concentration unit that tells how many moles of a substance are in a liter of solution. It is determined by dividing the number of moles of a substance by the number of liters in a solution

Question 25

What is equation 9.1

Answer 25

M equals # Moles over # Liters

Question 26

Dilution

Answer 26

Adding water to a solution to decrease the concentration

Question 27

What is equation 9.2

Answer 27

M1 V1 equals M2 V2

Question 28

What is the important relationship between molarity and moles?

Answer 28

When the number of moles is divided by volume in liters we get Molarity. When molarity is multiplied by volume in liters we get the number of moles

Question 29

What is the endpoint of titration?

Answer 29

It is when the color changed in the indicator