Concept explainers
(a)
Interpretation:
The reaction of calcium carbonate to calcium oxide and carbon dioxide has to be classified as combination, decomposition, single replacement or double replacement reactions.
Concept Introduction:
Combination reactions: In these reactions, the reactant combines to form a single product. This type of reaction occurs between either two elements, an element and a compound or two compounds. It is recognized easily because it involves two reactants and only a single product.
Decomposition reactions: Decomposition reactions are the opposite of a combination reaction because decomposition reaction involves the breaking apart of a substance into simpler substances. Such a reaction is also easy to recognize because there is one reactant and more than one product.
Single replacement reactions: A reaction where an element in a compound is replaced by another element is called single replacement reaction or a substitution reaction. It generally involves between a dilute solution of an acid and a metal.
Double replacement reactions: This type of reactions occurs when the cation and the anions switch between two reactants to form new products. In order for the reaction to occur, one of the products is usually a solid precipitate, a gas or a molecular compound.
(b)
Interpretation:
The reaction of formation of ammonium chloride from ammonia and hydrogen chloride has to be classified as combination, decomposition, single replacement or double replacement reactions.
Concept Introduction:
Refer to part (a).
(c)
The reaction of formation of silver chloride and bromine from silver bromide and chlorine has to be classified as combination, decomposition, single replacement or double replacement reactions.
Concept Introduction:
Refer to part (a).
(d)
Interpretation:
The reaction of formation of silver iodide and sodium sulphate from silver sulphate and sodium iodide has to be classified as combination, decomposition, single replacement or double replacement reactions.
Concept Introduction:
Refer to part (a).
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