In Chemistry on Friday March 2, 2012, we were reviewing some of the different reactions we have been practicing in class and on OWL assignments. Some of my favorite chemical equations include precipitate, acid and base, gas forming, double replacement and redox. These are a few of the basic equations used in chemistry and it is important to understand the basics before moving on to the more complicated tasks. Below are examples of each of the following that were listed above.

Precipitate:

ZnBr₂ (aq) + 2AgNO₃ (aq) --> Zn(NO₃)₂ (aq) + 2 AgBr (s)

                2AgBr à 2Ag ⁺ + Br^-

Gas Forming:

Mg (s) + 2 HCl (aq) --> MgCl₂ (aq) + H₂ (g)

Double Replacement:

(NH₄)CO₃ (aq) + AlCl₃ (aq) --> NH₄Cl (aq) + Al₂(CO₃)₃ (aq)

Acid/Base:

2NaOH (aq) + H₂S (aq) --> Na₂S (aq) + H₂O (l)

                2OH^- + H₂S à S^2- + H₂O

H₂CO₃ (aq) + NaOH (aq) --> Na₂CO₃ (aq) + H₂O (l)