Effect of Non-linear Temperature on the Determination of a Precise pH of Buffer Solutions

In article, we have reported a non-linear temperature effect on the determination of a precise pH value of buffer solutions. A buffer solution resists the changes in pH when small amounts of acid or base are added, although, these pH may still change with respect to temperatures. The temperature effect on buffer solutions is not always remain constant, and, reveals how pH properties change in a way that is not directly proportional to temperature variations. This contrasts with changes in a linearity where a change in temperature results in a expectable proportional change in the pH of buffer solutions. This is due to the temperature dependent nature of equilibrium constant of reaction rates, leading to non-linear pH shifts. Graphically, the plot of linear temperature against pH, show a straight line, either upward sloping (positive correlation), or downward (negative correlation), and a plot for non-linear as often sigmoidal.