Lesson 2 ­ Synthesis and Decomposition Reactions
March 12, 2015
4.2 ­ Synthesis and Decomposition Reactions
1. Synthesis Reaction
• Two (or more) simple substances combine to form one complex substance. A + B
→
AB
eg) 2 H2(g) + O2(g) → 2 H2O(g)
Feb 28­11:23 AM
Predicting the products of a synthesis reaction...
eg) magnesium + oxygen gas →
eg 2) calcium + sulfur →
Mar 27­10:18 AM
1
Lesson 2 ­ Synthesis and Decomposition Reactions
March 12, 2015
Synthesis reactions involving hydrogen...
eg) hydrogen gas + oxygen gas →
Mar 27­10:42 AM
Synthesis reactions involving compounds...
eg) H2O(l) + CO2(g) → H2CO3(aq)
eg 2) H2O(l) + SO3(g) → H2SO4(aq)
Mar 27­10:42 AM
2
Lesson 2 ­ Synthesis and Decomposition Reactions
March 12, 2015
2. Decomposition Reaction
• A complex molecule or ionic compound breaks down into two (or more) simple substances. AB
→
A + B
eg) 2 H2O2(l) → 2 H2O(l) + O2(g) Feb 28­11:23 AM
Predicting the products of a decomposition reaction...
eg) water →
eg 2) sugar (C12H22O11)(s) → Mar 27­10:49 AM
3