Page 6 - E-LKM ACID BASE_Neat

Lembar Kerja Mahasiswa - Asam Basa

Acid-Base Theory

1. Arrhenius Theory

According to Arrhenius, acids are substances
which release H ions in water, while bases are
+
_
substances which release OH ions in water. So
+
the carriers of acidic properties are H ions,
_
while the carriers of basic properties are OH
ions. Arrhenius acid is formulated as H Z, which
x
ionizes in water as follows.

H Z H + Z x- Figure 3.
+
x
x
Svante Arrhenius
Sumber: Wikipedia.com

The number of H ions that can be produced by 1 acid molecule is
+
called the valence of the acid, while the negative ion formed from the
+
acid after releasing H ions is called the residual acid ion. Some
examples of acids can be seen in table 1 below.

The Arrhenius base is a metal hydroxide, M(OH) , which decomposes
x
in water as follows.

x+
Mg(OH) M + OH -
x
x
x
The number of OH ions that can be released by one base molecule
-
is called the base valence. Some examples of bases can be seen in
table 2 below.

(James E. Brady, 2012)

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