pH Calculator. The pH is a measure of the concentration of hydrogen ions in an aqueous solution. Computing pK a from K a means performing the same operation as with pH: Take the negative logarithm of K a, and there is your answer. Added Mar 27, 2014 by kalexchu in Chemistry. Alternatively, it can be used to find the pOH value of a base by inputting its pKb value in the "pKa=" input field. For each compound enter compound name (optional), concentration and Ka/Kb or pKa/pKb values. It can be inferred that a higher value of Ka resemble stronger acid. Instructions for pH Calculator Case 1. The ionization of an acid in water measures the relative strength of the acid. How to Use Ph Calculator? Solution is formed by mixing known volumes of solutions with known concentrations. Calculating pH from pKa: The Henderson-Hasselbach Equation. For example: CH3COOH pKa=4.76 c=0.1 HCl pKa=-10 c=0.1 Case 2.
Thus a lower value of pKa (since pKa = -logKa ) which -logKa will resemble a stronger acid. Initial concentrations of components in a mixture are known. BYJU’S online Ph calculator tool makes the calculation faster, and it displays the Ph measurement in a fraction of seconds. You can calculate the pH of a solution given the pKa of the acid and the concentrations above, that of the donated protons excluded.
pKa (acid dissociation constant) and pH are related, but pKa is more specific in that it helps you predict what a molecule will do at a specific pH.Essentially, pKa tells you what the pH needs to be in order for a chemical species to donate or accept a proton. For simplicity we denote strength of an acid in term of -log[H+]. To Calculate: Enter Concentration: Enter Chemical Name/Formula: Calculate: Computing... Get this widget. Ph Calculator is a free online tool that displays the Ph value for the given chemical solution. This widget finds the pH of an acid from its pKa value and concentration.
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