1) Balance this equation: CaC 2(s) + H 2 O (l)  C 2 H 2(g) + Ca(OH) 2(s) Ca C H O

Types of chemical reactions

Decomposition (breaking down) Synthesis (composition) Single Displacement (single replacement) Double Displacement (double replacement) Combustion (burning) Redox (reduction/oxidation)

Assembling smaller parts into something new… A + B  AB 2H 2(g) + O 2(g)  2H 2 O (g)

Burning requires… Fuel + oxidizer  fuel oxide with flames present. 2H 2(g) + O 2(g)  2H 2 O (g) + fire CH 4 + 2O 2  CO 2 + 2H 2 O + fire

Breaking down into parts… AB  A + B 2H 2 O (l)  2H 2(g) + O 2(g)

One thing gets pushed out of the way… A + BC  B + AC Fe 2 O 3 + 2Al  Al 2 O 3 + 2Fe

Two things get moved to new places… AB + CD  AD + CB PbCl 2 + 2NaI  PbI 2 + 2NaCl

3Mg (s) + N 2(g)  Mg 3 N 2(s) NiCl 2(aq) + 2NaOH  Ni(OH) 2 (s) + 2NaCl (aq) 2Na (s) + 2HOH (l)  2NaOH (aq) + H 2(g) (NH 4 ) 2 CO 3 (s)  2NH 3(g) + H 2 O (l) + CO 2(g) 2Cu(s) + S (s)  Cu 2 S (s) HCl (aq) + NaOH (aq)  NaCl (aq) + H 2 O (l) Synthesis Double Displacement Single Displacement Decomposition Synthesis Double Displacement

2) Write a balanced equation for this reaction: Dicarbon dihydride burns in oxygen to produce carbon dioxide and water vapor. (Identify the type of reaction)