# Writing Chemical Formulas and Balancing Chemical Equations Webquest

​This activity goes with Chapters 6 and 7 in your textbook.

Let's begin.
Start by reading the following review of how to name compounds.

First lets review how to name compounds.
REMEMBER, if it is ionic (metal + nonmetal), you write the name of the metal first and end the nonmetal with -ide. If you are writing the formula then you have to make the cation and anion charges (also called oxidation numbers) equal zero. For example, potassium sulfide contains the metal cation K with a charge of +1 and the nonmetal anion S with a charge of -2. So we would need 2 +1 for every 1 -2 (+1+1-2=0). The formual would be K2S.
To figure out cation and anion charges look at the periodic table. Group 1A has a +1 charge, group 2A has a +2, group 3A (where Al is) has a +3, skip group 4A because they don't form ions, group 5A has a -3 charge, group 6A has a -2 charge, group 7A has a -1 charge, and group 8A doesn't react.
 periodic table group 1A or alkali metals 2A or alkaline earth metals 3A or Aluminum 4A or Carbon Family 5A or Nitrogen Family 6A or Oxygen Family 7A or Halogens 8A or Noble Gases charge +1 +2 +3 don't form ions -3 -2 -1 don't react

Transition metal (the short columns in the middle of the table) charges are given to you in the form of Roman numerals. I =+1, II = +2, III = +3, IV = +4.
Polyatomic ions are compounds that have a charge. I will always give you a list of these when you need them.
 polyatomic ion formula charge carbonate CO3 -2 sulfate SO4 -2 ammonium NH4 +1 nitrate NO -3
For covalent compounds (nonmetal + nonmetal) you use prefixes to name the compound. The prefix stands for how many of that atom there are in the compound. You must know the prefixes for the test. For example, carbon dioxide contains 1 C and 2 O's so we write CO
. You name the most metalic element first (further left or if in the same column, further down). If there is only 1 of the first element you do not have to use the mono- prefix but you must use it if there is only 1 of the second element. For example carbon monoxide contains 1 carbon and 1 oxygen (CO).
Greek Prefixes
Number
mono-
1
di-
2
tri-
3
tetra-
4
penta-
5
hexa-
6
hepta-
7
octa-
8
nona-
9
deca-
10
Now lets practice.
Click on the following link. You will be presented with a series of multiple choice questions. Complete them and click "check answers". Redo any that you missed and ask me for help if you don't understand why you missed them.
Multiple Choice Practice Writing Chemical Formulas

Then complete the following to turn in for a grade.
WRITE THIS PART ON YOUR PAPER!!!!!!!!!!!!!!!!1
Each of the following 3 links will take you to a quiz that contains 4 formulas to write (that is 12 total). Number your paper 1-12 and write the formulas in the order that you come to them. Keep the paper because I will need to make notes on it later in the webquest.
Naming Binary Compounds
Naming Compounds with Polyatomic Ions
Naming Compounds with Transition Metals

Now lets talk about balancing chemical equations.

Balancing Chemical Equations Game

WRITE THIS PART ON YOUR PAPER!!!!!!!!!!!!!!!!!1
Now lets talk about the different types of chemical reactions. Number your paper 1-4. Identify each of the following pictures in the link below as synthesis (A+B=AB), decomposition (AB=A+B), single replacement (AB+C=A+CB), or double replacement (AB+CD=AD+CB).
Cartoon Chemistry--Identifying Chemical Reactions

BONUS-----------+10 FOR ANY YOU CAN BEAT! CALL ME OVER TO VERIFY!
Just for fun, see if you can win these games. If you beat any of them let me know (call me over to verify that you did beat it) and I will give you bonus points!!!!
Fill in the Periodic Table Game
Element Symbols Game
Element Game
Elements that Don't End in "um" Game
Elements in the Body Game
Latin Element Names
Noble Gases
Periodic Table Movies (I like this one!)
Roman Numerals
Single Letter Elements

Shut down your computer and carefully bring it to the laptop cart.
Turn in your paper in the box with your name on it.