Chemistry Reference
In-Depth Information
Lesson 6-4 Review
1.
_______________ is when a substance gains electrons, or appears to
gain electrons, as its oxidation number is reduced algebraically.
2.
The ______________ agent in a redox reaction is the substance that
causes another substance to become oxidized.
3.
_______________ is when a substance loses electrons, or appears to
lose electrons, as its oxidation number appears to increase
algebraically.
4.
The ______________ agent in a redox reaction is the substance that
causes another substance to become reduced.
Use the rules for assigning oxidation numbers to assign the correct oxi-
dation numbers to each element in each of the following redox reactions.
Then, identify the substance that is being oxidized, the substance that is be-
ing reduced, the reducing agent, and the oxidizing agent for each reaction.
5.
3H
2
+ N
2
2NH
3
7.
Zn + H
2
SO
4
ZnSO
4
+ H
2
6.
Fe
2
O
3
+ 3CO
2Fe + 3CO
2
8.
2Mg + O
2
2MgO
Lesson 6-5: Nuclear Reactions
Take a look at the following reaction.
40
19
K
40
20
Ca +
0
-1
e
At first glance, you might mistake this for a chemical equation. The
format of the equation is similar to the format of a chemical equation,
including elemental symbols and a “yields” arrow. The elemental notation
that is shown for both potassium and calcium is the same as the elemental
notation that we covered in Lesson 3-2. However, there is an important dif-
ference between this equation and the chemical equations that we have been
discussing up until now. Notice that we have different elements on either
side of the equation! This is evidence that we are looking at a nuclear equa-
tion, rather than a chemical one.
The equation shows an atom of potassium transforming into an atom
of calcium and an additional particle that we haven't learned yet. When we
discussed creating an atomic tally to balance a chemical equation in Les-
son 6-1, we said that you must have the same number of atoms of each
