Download Equation Intro Worksheet 1213

Equation Introduction Worksheet
Honors Chemistry
Reactions #1
Name ____________________________
1. On another sheet of paper, define the following terms related to chemical reactions…
a) products
b) reactants
c) coefficients
d) subscripts
e) catalyst
f) skeleton equation
g) balanced equation
h) word equation
i) states of matter
2. Use your definitions from problem 1 to figure this one out…
3 Fe (s) + 4 H2O (g) → Fe3O4 (s) + 4 H2 (g)
a)
b)
c)
d)
underline the side with the products
circle the side with the reactants
draw hearts around the coefficients
make a smiley face around the states of
matter
e) draw a Christmas tree around the subscripts
f) put a star around any of the compounds that
would be ionicly bonded
g) draw a pentagon around the symbol that
means “yield”
3. There are eight diatomic elements. Use page 222 to…
a) define the term diatomic element
b) list the eight diatomic elements
4. The reaction written here is drawn below…
3 Fe (s) + 4 H2O (g) → Fe3O4 (s) + 4 H2 (g)
Fe
H
Fe
Fe
H
O
H
H
Fe
O
H
O
H
H
H
Fe
H
O
O
O
H
O
H
H
H
H
H
H
Fe
O
Look at the above picture and the ones on pages 325-327 to see why these reactions are drawn
the way they are…(note that the book uses colors to identify each element’s atoms where I’ve
used letters because this is a black and white photocopy)
5. In the space below, draw the reaction written…use number three above as a guide…
U (s) + 3 F2 (g)
UF6 (g)
6. Look at the reaction that you drew in problem #5 on the front side…check to make sure that you know
UF6 means that you have one uranium atom connected to six fluorine atom…then make sure that you
drew 3 F2 as three pairs of fluorine atoms …three pairs of atoms…each pair connected but the three
not connected – like this
F
F
F
F
F
F
7. Write the skeleton equations from the word equations listed below…
a) sodium + chlorine gas → sodium chloride
(check #3 on the front)
b) zinc + hydrogen chloride → zinc chloride + hydrogen gas
(check #3 on the front again)
c) potassium iodide + lead (II) nitrate → lead (II) iodide + potassium nitrate
d) calcium carbonate → calcium oxide + carbon dioxide
e) aluminum + oxygen gas → aluminum oxide
f) hydrogen gas + nitrogen gas → ammonia (also known as nitrogen trihydride)
8. What does a catalyst do for a chemical reaction?
9. Write the skeleton reaction for this situation…(you might also need to remember that peroxide is O2-2 ,
and that can’t be reduced at all)…
An aqueous solution of hydrogen peroxide breaks down into water and oxygen gas when a catalyst
of powdered manganese (IV) oxide is used.
10. Check your answer to number nine by using the exact same reaction as shown on page 323…did you
get it correct?…if not, what mistakes did you make and why did you make them?