Earths Resources Flashcards
(25 cards)
What is reduction in chemistry?
Reduction is the gain of electrons or a decrease in oxidation state by a molecule, atom, or ion.
True or False: Ores are naturally occurring solid materials from which a metal or valuable mineral can be extracted.
True
What is the reactivity series?
The reactivity series is a list of metals arranged in order of decreasing reactivity.
Fill in the blank: A ______ is a chemical compound formed from the reaction of an acid with a base.
salt
What is displacement reaction?
A displacement reaction is a chemical reaction where an element reacts with a compound and displaces another element from it.
Which metal is most reactive: Potassium, Iron, or Gold?
Potassium
True or False: Catalysts are substances that increase the rate of a chemical reaction without being consumed in the process.
True
What does it mean for a metal to be unreactive?
An unreactive metal does not easily undergo chemical reactions, including displacement and oxidation.
What is a common example of a catalyst in the Haber process?
Iron
What happens to the oxidation state of an element that is reduced?
The oxidation state decreases.
Multiple choice: Which of the following is NOT a method of extracting metals from their ores? A) Electrolysis B) Smelting C) Photosynthesis
C) Photosynthesis
Fill in the blank: A ______ reaction occurs when a more reactive metal displaces a less reactive metal from its compound.
displacement
What is the primary purpose of a catalyst in a chemical reaction?
To lower the activation energy and increase the reaction rate.
True or False: Salts can be formed from the reaction of acids with metals only.
False
What is the chemical formula for common table salt?
NaCl
Which of the following is a property of salts? A) They are typically soluble in water B) They have a high melting point C) They can conduct electricity when dissolved in water D) All of the above
D) All of the above
What is the result of a metal reacting with an acid?
It produces a salt and hydrogen gas.
Fill in the blank: The process of removing impurities from ore is called ______.
refining
What does the term ‘oxidation’ refer to in a chemical reaction?
The loss of electrons or an increase in oxidation state.
True or False: The reactivity series can be used to predict the outcomes of displacement reactions.
True
What is the effect of increasing temperature on the rate of reaction for catalysts?
It generally increases the rate of reaction.
What is the primary function of a reducing agent in a reduction reaction?
To donate electrons to another substance.
Fill in the blank: ______ are substances that undergo reduction in a redox reaction.
Oxidizing agents
Which group of metals are typically found at the bottom of the reactivity series?
Noble metals, such as gold and platinum.
