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Unit 2: Chemical Bonding, Application of Chemical Reactions, and Organic Chemistry
2.3 Metals and Their Extraction
2.3.2 Extraction Methods
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Cards (40)
More reactive metals require energy-intensive extraction methods like
electrolysis
Which metals are commonly extracted using reduction with carbon?
Iron, copper, zinc
Steps in the displacement reaction method for extracting iron:
1️⃣ React iron oxide with carbon
2️⃣ Heat the mixture
3️⃣ Carbon reduces iron oxide
4️⃣ Iron is produced
The cost of reduction with carbon is
low
Metal extraction refers to obtaining a metal from its
ore
.
True
Which extraction method is used for highly reactive metals like aluminum?
Electrolysis
What is the chemical equation for the extraction of iron from iron oxide using carbon?
F
e
2
O
3
+
Fe_{2}O_{3} +
F
e
2
O
3
+
3
C
→
2
F
e
+
3C \rightarrow 2Fe +
3
C
→
2
F
e
+
3
C
O
3CO
3
CO
Arrange the key steps in the electrolysis process:
1️⃣ Electrolyte preparation
2️⃣ Electrode setup
3️⃣ Current application
4️⃣ Metal deposition
The choice of metal extraction technique depends on balancing the reactivity of the metal,
ore availability
, and overall cost.
True
What is the term for obtaining a metal from its ore?
Metal extraction
Biological extraction uses
microorganisms
for extracting metals.
True
Carbon is more reactive than iron in the
displacement reaction
with iron oxide.
True
Electrolysis is effective for extracting highly reactive metals like sodium and aluminum.
True
Match the metal extraction method with examples of metals extracted:
Reduction with carbon ↔️ Iron, copper, zinc
Electrolysis ↔️ Sodium, magnesium, aluminum
Biological extraction ↔️ Copper, gold, cobalt
Rarer ores may require more
complex
and costly extraction processes.
True
Electrolysis is used for extracting highly reactive metals like
sodium
In the displacement reaction for iron, carbon is more reactive than
iron
Biological extraction is commonly used for metals with medium
reactivity
Arrange the main metal extraction methods by increasing reactivity of the metal:
1️⃣ Reduction with carbon
2️⃣ Biological extraction
3️⃣ Electrolysis
Biological extraction, also known as bioleaching, uses microorganisms to extract metals from their
ores
In the displacement reaction, carbon is more reactive than
iron
At which electrode in electrolysis do metal ions gain electrons and deposit as pure metal?
Cathode
What are the three main factors that influence the choice of metal extraction method?
Reactivity, abundance, cost
Reduction with carbon is suitable for extracting metals with low to medium
reactivity
The displacement reaction method uses a more reactive metal to displace a less reactive metal from its
ore
Electrolysis involves passing an electric current through a molten compound or solution containing the metal
ions
What is metal extraction defined as?
Obtaining a metal from its ore
Match the extraction method with its characteristics:
Reduction with carbon ↔️ Low reactivity, common ore, low cost
Electrolysis ↔️ High reactivity, rare ore, high cost
Biological extraction ↔️ Medium reactivity, common ore, medium cost
Biological extraction is also known as bioleaching.
True
Which metals are suitable for extraction by the displacement reaction method?
Iron, copper, zinc
The displacement reaction method is suitable for extracting metals like iron, copper, and
zinc
Reduction with carbon uses carbon (e.g., coke) at high temperatures to reduce
metal oxide
ores.
True
In the displacement reaction method, a more reactive metal displaces a less reactive metal from its compound.
True
Electrolysis involves passing an electric current through a
molten
compound or solution to extract metals.
True
One disadvantage of electrolysis is that it requires high
energy
More reactive metals require more energy-intensive extraction methods like
electrolysis
Rank the main metal extraction methods based on their energy usage, from lowest to highest:
1️⃣ Reduction with carbon
2️⃣ Displacement reaction
3️⃣ Biological extraction
4️⃣ Electrolysis
What are the products of reacting iron oxide (
F
e
2
O
3
Fe_{2}O_{3}
F
e
2
O
3
) with carbon (
C
C
C
) in the displacement reaction?
Iron and carbon monoxide
What type of electrode is negatively charged in electrolysis?
Cathode
Biological extraction is a medium-cost, medium-energy option for moderately reactive
metals