5.1 Synthesis and Decomposition Reactions

5.1 Synthesis and Decomposition Reactions

Metal corrosion led to the damage shown in the picture below. The ______ that occurred is illustrated by the following balanced ______. ___ Fe(s) + ___O2(g) à ___Fe2O3(s)

Evidence of Chemical Change

The following images illustrate some examples of evidence that a ______ has occurred.

______– usually observed as bubbles

______ – an insoluble solid formed during a reaction

______ – a new colour being produced

______ – the production of light or heat by a reaction

______ – reaction cannot occur in the opposite direction (e.g. )

Synthesis Reactions

A ______ is a chemical reaction in which ______reactants combine to produce a ______.

Examples of synthesis reactions

·  The “______” process to ______ammonia ___N2(g) + ___H2(g) à ___NH3(g)

·  The shuttle “______” ___H2(l) + ___O2(l) à ___H2O(g)

·  The production of “_____” ___N2(g) + ___O2(g) à ___NO2(g) and ___NO(g) + ___O2(g) à ___NO2(g)

Draw molecules of Cl2 and H2 combining to form HCl:

Decomposition Reactions

A ______ is a chemical reaction in which a compound ______(decomposes) into ______ compounds or elements.

Examples of decomposition reactions

The ______of water ___H2O(l) à ___H2(g) + ___O2(g)

A ______Explosion

___C7H5N3O6 (s) à ___N2(g) + ___H2O(g) + ___CO(g) + ___C(s)

Decomposition of sodium azide ___NaN3(s) à ___N2(g) + ___Na(s)

Draw molecules of CaCO3 breaking down to form CaO and CO2:

5.2 Displacement Reactions

A single displacement reaction is a chemical reaction in which ______ (a reactive metal or non-metal______of an element in a compound to ______ another element and another compound.

A + BC AC + B - Where A is a ______

A + BC BA + C - Where A is a ______

List one example:

The ______ is a list of elements organized according to their chemical ______. The ______reactive element appears on the ______, and the ______reactive appears at the ______.

Remember! ______can only replace other ______in a reaction, and ______can only replace other ______.

Metals ______on the activity series list will ______metals lower on the list during a ______.

Double Displacement Reactions

A double displacement reaction is a chemical reaction in which the ______of two different compounds ______, resulting in the formation of two ______ – one of which may be a precipitate.