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Chemical Reactions Overview

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Questions and Answers

What is the general formula for a synthesis reaction?

A + B → AB (correct)
A → AB + B
AB → A + B
A + B → C

Which of the following is an example of a decomposition reaction?

2 H2O(l) → 2 H2(g) + O2(g) (correct)
2 SO2(g) + O2(g) → 2 SO3(g)
Ca(OH)2(s) + H2O(l) → CaO(s) + H2(g)
S(g) + O2(g) → SO2(g)

What occurs during a synthesis reaction involving a binary compound?

Two elements combine to form a binary compound.
An element reacts with oxygen to produce water.
A single compound decomposes.
Two compounds combine to form a new compound. (correct)

What is one of the results of a metal carbonate decomposition reaction?

<p>Formation of a metal oxide and carbon dioxide. (B)</p> Signup and view all the answers

Which of the following statements is true regarding decomposition reactions?

<p>One compound breaks down into two or more products. (C)</p> Signup and view all the answers

Flashcards

Chemical Reaction

A chemical reaction where one or more substances change their chemical composition to form new substances.

Synthesis Reaction

A chemical reaction where two or more reactants combine to form a single product. The general formula is A + B -> AB.

Decomposition Reaction

A chemical reaction where a single compound breaks down into two or more products. The general formula is AB -> A + B.

Decomposition into Elements

A type of decomposition reaction where a binary compound decomposes into its elements. For example, 2 H2O(l) -> 2 H2(g) + O2(g)

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Decomposition of Metal Carbonates

A decomposition reaction where a metal carbonate decomposes into a metal oxide and carbon dioxide. For example, CaCO3(l) -> CaO(s) + CO2(g)

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Study Notes

Chemical Reactions

Reactions occur when substances change composition and form new substances.
Reaction type can be predicted by observing reactants and products.

Synthesis Reactions

Two or more reactants combine to form one product.
General formula: A + B → AB
Synthesis reactions can form binary compounds.
An element and a compound can react to form a new compound.
Two compounds can combine to form a new compound.

Decomposition Reactions

One compound breaks down into two or more products.
General formula: AB → A + B
Binary compounds can decompose into their elements.
Metal nitrates decompose into oxygen and a metal nitrite.
Metal carbonates decompose into a metal oxide and carbon dioxide.
Metal hydroxides decompose into a metal oxide and water.
Metal chlorates decompose into a metal chloride and oxygen.

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