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57
<Example 2>
Let the acetic acid concentration be
c
(= 0.1 mol / ), and the hydrogen ion
concentration be
x
.
(1) Solve the following quadratic equation to find the hydrogen ion concentration
x
:
x
3
+
K
a
x
2
- (
cK
a
+
K
w
)
x
-
K
a
K
w
= 0
where
K
a
= 2.75 x 10
-5
[mol / ] (ionization equilibrium constant of acetic acid)
K
w
= 1.0 x 10
-14
[mol / ] (ionic product of water)
(2) Use the result of (1) to find the pH (= - log
x
) of acetic acid.
Save constants
(1)
pH = - log
x
(
x
>0)
2.75
5
0 (NORMAL)
Operation
1.0
0.1
14
B
C
Display
Polynomial equation
C
B
(Function for EL-W506X/EL-W516X/EL-W506)
Содержание WriteView EL-W531X
Страница 1: ...SCIENTIFIC CALCULATOR OPERATION GUIDE SCIENTIFIC CALCULATOR OPERATION GUIDE Write View ...
Страница 38: ...37 Example Operation Absolute Value Returns an absolute value Display 3 4 ...
Страница 54: ...53 3 100 10 20 3000 0 x x dx Integration calculation x dx ...
Страница 70: ...69 a b r ...
Страница 75: ... SHARP CORP SEP 13 ...