Acids and Bases Flashcards

1
Q

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

A

B

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2
Q

Which element is most similar to oxygen?

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

A

C

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3
Q

Which of the following is considered PURE?

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

A

B

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4
Q

Why do you smell perfume across a room?

A

Perfume molecules move randomly

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5
Q

Which pH indicates highest ionization of H+ from HCl?

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

A

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6
Q

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

A

Ionic

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7
Q

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

A. Water
B. Acid
C. Base

A

C

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8
Q

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

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

A

C

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9
Q

What makes a substance react faster ?

A

Break substance into smaller pieces

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10
Q

What would make a reaction happen SLOWER ?

A

Cool it

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11
Q

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

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

A

A

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12
Q

Is HCl an acid or base?

A

Acid

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13
Q

Is NaOH an acid or base?

A

Base

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14
Q

Is NaCl an acid or base?

A

Neither

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15
Q

Is H2O an acid or base?

A

Both

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16
Q

Is H2SO4 an acid or base?

A

Acid

17
Q

Is CO2 an acid or base?

A

Acid

18
Q

2HCl + Zn —> H2 + ZnCl2

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

A

26.90gZn

19
Q

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)

A

Answer: 63,327J

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

20
Q

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

A

Answer: 2.6 M KCl

Work:

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

50/1000 = 0.05L

  1. 13 mol
    - ——– = 2.6 M KCl
  2. 05L