Acids and Bases Flashcards
(20 cards)
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
B
Which element is most similar to oxygen?
A. Carbon
B. Nitrogen
C. Sulfur
D. Fluorine
C
Which of the following is considered PURE?
A. Tap water
B. Brass
C. 14K gold
D. Table salt
B
Why do you smell perfume across a room?
Perfume molecules move randomly
Which pH indicates highest ionization of H+ from HCl?
A. 2 B. 6 C. 7 D. 8 E. 13
A
Sodium and chlorine bond to form NaCl. What type of bond holds them together ?
Ionic
Which of the following is a compound that would best neutralize an acid?
A. Water
B. Acid
C. Base
C
Which ion would cause a solution to have a pH of 2?
A. Na+
B. OH-
C. H+
D. Cl-
C
What makes a substance react faster ?
Break substance into smaller pieces
What would make a reaction happen SLOWER ?
Cool it
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
Is HCl an acid or base?
Acid
Is NaOH an acid or base?
Base
Is NaCl an acid or base?
Neither
Is H2O an acid or base?
Both
Is H2SO4 an acid or base?
Acid
Is CO2 an acid or base?
Acid
2HCl + Zn —> H2 + ZnCl2
How many grams of zinc are needed to react exactly with 15g of HCl?
26.90gZn
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: 63,327J
Work:
E= (4.18)(500)(30)
E= 63,327J
What is the molar concentration of a KCl solution having 10 grams of KCl in 50mL of water?
Answer: 2.6 M KCl
Work:
1 mol KCl 10 g KCl • ------------ = 0.13 mol KCl
74.55 g KCl
50/1000 = 0.05L
- 13 mol
- ——– = 2.6 M KCl - 05L
