Gran Plot - Titrating Strong Base With Strong Acid | Titrating Strong Base Strong Acid

Titrating Strong Base With Strong Acid

Mirror-image plots are obtained if titrating the base with the acid, and the signs of the slopes are reversed.

$\frac{v_0 _0-v_i_0}{v_0+v_i} \begin{cases} \approx _i \text{ or } K_w 10^{pH_i} & \text{ when } v_{0^{ }} _0 > v_i_0 \text{ (alkaline region)} \\ = 0 & \text{ when } v_{0^{ }} _0 = v_i_0 \text{ (equivalence point)} \\ \approx -_i \text{ or } -10^{-pH_i} & \text{ when } v_{0^{ }} _0 < v_i_0 \text{ (acidic region)} \end{cases}$

Hence,

a plot of will have a linear region before equivalence with slope
and a plot of will have a linear region after equivalence with slope
both plots will have as x-intercept

Figure 1 gives sample Gran plots of a strong base-strong acid titration.

Famous quotes containing the words strong and/or base:

“Home is a name, a word, it is a strong one; stronger than magician ever spoke, or spirit ever answered to, in the strongest conjuration.”
—Charles Dickens (1812–1870)

“Yet herein will I imitate the sun,
Who doth permit the base contagious clouds
To smother up his beauty from the world,
That when he please again to be himself,
Being wanted, he may be more wondered at
By breaking through the foul and ugly mists
Of vapors that did seem to strangle him”
—William Shakespeare (1564–1616)