The glass electrode (together with other Ion selective electrodes) really should be calibrated in the medium comparable to the 1 becoming investigated. By way of example, if a person needs to measure the pH of a seawater sample, the electrode needs to be calibrated in a solution resembling seawater in its chemical composition.
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By definition, pOH will be the damaging logarithm(to the base 10) on the hydroxide ion concentration (mol/L). pOH values is often derived from pH measurements and vice-versa. The focus of hydroxide ions in h2o is related to the concentration of hydrogen ions by
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Cần thiết phải biết giá trị của hằng số cân bằng của phản ứng cho mỗi axít để có thể tính pH của nó.
wherever μH+ is definitely the chemical potential of the hydrogen ion, μ H + ⊖ displaystyle mu _ ce H+ ^ ominus
Nonetheless the pH with the neutral NaCl Answer is going to be slightly diverse from that of neutral pure h2o as the hydrogen and hydroxide ions' activity is dependent on ionic strength, so Kw differs with ionic energy.
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Up coming, together with his collaborators, Dr. Clark designed precise solutions for measuring hydrogen-ion focus. These methods changed the inaccurate titration technique of pinpointing the acid content in use in biologic laboratories throughout the world. Also they were found to be relevant in several industrial and various procedures through which they came into broad use.[twelve]
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