Untitled - Kelly Walsh High School

68 CHEMISTRY FOR THE UTTERLY CONFUSED
Li(s) l Li (aq) e
Mg(s) l Mg 2 (aq) 2 e
Al(s) l Al 3 (aq) 3 e
Zn(s) l Zn 2 (aq) 2 e
Fe(s) l Fe 2 (aq) 2 e
Ni(s) l Ni 2 (aq) 2 e
H 2(g) l 2 H (aq) 2 e
Cu(s) l Cu 2 (aq) 2 e
The location of these species is very important. If there is to be a reaction, the
substance on the left must be above the substance on the right. If this is not true,
or if both substances are on the same side, there will be no reaction. If there is
a reaction, the substance higher on the table will react as shown in the table, and
the lower substance will react in the reverse direction. From the table, we need
to copy the reactions (remembering to reverse the lower reaction). We only
need the two equations from the table, and to know there positions relative to
each other.
The other reactions give:
HCl(aq) Ni(s) l
H Cl
Ni(s) l Ni 2 (aq) 2 e
2 H (aq) 2 e l H 2(g)
CuBr 2(aq) Zn(s) l
Cu 2 Br
Zn(s) l Zn 2 (aq) 2 e
Cu(s) l Cu 2 (aq) 2 e
There will be a reaction, so we need to reverse the second equation.
Mg(s) HC 2H 3O 2(aq) l
H C 2H 3O 2
Mg(s) l Mg 2 (aq) 2 e
H 2(g) l 2 H (aq) 2 e
There will be a reaction, so we need to reverse the second equation.
Al 2(SO 4) 3(aq) Fe(s) l
Al 3 SO 4 2
Al(s) l Al 3 (aq) 3 e
Fe(s) l Fe 2 (aq) 2 e