Acids and Bases

Question 1

Under what conditions does 1 mole of hydrogen gas occupy 22.4L ?

A. 1 atmosphere and 1K
B. 101.3 kpa and 273K
C. 20 kpa and 760K
D. 14.7 mmHg and 0K

Answer 1

B

Question 2

Which element is most similar to oxygen?

A. Carbon
B. Nitrogen
C. Sulfur
D. Fluorine

Answer 2

C

Question 3

Which of the following is considered PURE?

A. Tap water
B. Brass
C. 14K gold
D. Table salt

Answer 3

B

Question 4

Why do you smell perfume across a room?

Answer 4

Perfume molecules move randomly

Question 5

Which pH indicates highest ionization of H+ from HCl?

A. 2
B. 6
C. 7
D. 8
E. 13

Answer 5

A

Question 6

Sodium and chlorine bond to form NaCl. What type of bond holds them together ?

Answer 6

Ionic

Question 7

Which of the following is a compound that would best neutralize an acid?

A. Water
B. Acid
C. Base

Answer 7

C

Question 8

Which ion would cause a solution to have a pH of 2?

A. Na+
B. OH-
C. H+
D. Cl-

Answer 8

C

Question 9

What makes a substance react faster ?

Answer 9

Break substance into smaller pieces

Question 10

What would make a reaction happen SLOWER ?

Answer 10

Cool it

Question 11

Which will drive the reaction to the right?
N2 + 3H2 <=> 2NH3 + 92kj

A. Less pressure
B. More NH3
C. Cool it
D. Less H2

Answer 11

A

Question 12

Is HCl an acid or base?

Answer 12

Acid

Question 13

Is NaOH an acid or base?

Answer 13

Base

Question 14

Is NaCl an acid or base?

Answer 14

Neither

Question 15

Is H2O an acid or base?

Answer 15

Both

Question 16

Is H2SO4 an acid or base?

Answer 16

Acid

Question 17

Is CO2 an acid or base?

Answer 17

Acid

Question 18

2HCl + Zn —> H2 + ZnCl2

How many grams of zinc are needed to react exactly with 15g of HCl?

Answer 18

26.90gZn

Question 19

A piece of hot metal was placed in a cup containing 500g of water. The water went from 20^C to 50^C. How much energy was released by the metal? (SpHt of water= 4.18j/g^C)

Answer 19

Answer: 63,327J

Work:
E= (4.18)(500)(30)
E= 63,327J

Question 20

What is the molar concentration of a KCl solution having 10 grams of KCl in 50mL of water?

Answer 20

Answer: 2.6 M KCl

Work:

                1 mol KCl 10 g KCl •  ------------ = 0.13 mol KCl
                74.55 g KCl 

50/1000 = 0.05L

0. 13 mol
   - ——– = 2.6 M KCl
1. 05L