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Video Source: www.youtube.com/watch?v=bNCr_T42oIE
In this lecture you will learn about following main points related to Acid base indicators. • 1) What are indicators and their examples • 2) Main points of Ostwald Theory of Acid and Base indicators • 3) Derivation of equation to calculate pH of indicators • 4) Action of Phenolphthalein indicator on the basis of Ostwald Theory and Common Ion Effect • 5)Action of Methyl Orange indicator on the basis of Ostwald Theory and Common Ion Effect. • Ostwald proposed the theory of acid-base indicators in 1884. According to Ostwald, indicators are weak organic acids or bases that exist in equilibrium between their colored and colorless forms. In the presence of hydrogen ions (H+) or hydroxide ions (OH-), the equilibrium shifts, causing a change in color. • For example, in the presence of acidic conditions, the indicator molecule gains a proton (H+), leading to a colored form. In basic conditions, the indicator loses a proton, resulting in a color change. Common indicators like litmus, phenolphthalein, and methyl orange operate based on this principle, reflecting shifts in pH through their distinct color changes. • #youtube • #acidbase • #mwschemistry • #drpuspendraclasses • #mjdchemistry • #gaurchemistry • #carewellpharma • #chemistryuntold • #najamacademy • #mwschemistry • #youtube
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