'Thymol blue' diaporamas de présentation

HSC CHEMISTRY CORE TOPIC 2

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ACID-BASE INDICATORS

ACID-BASE INDICATORS. An acid-base indicator is a weak acid or a weak base. Examples of indictors used in acid base reactions Litmus Phenolphthalein Methyl orange

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Acids Lesson 14 Calculating Kbs

Acids Lesson 14 Calculating Kbs. You can calculate the Kb using the Ka from the data package page 6 and the equation below. Ka x Kb = 1.0 x 10 -14 @ 25 o C Kb = Kw Ka(conjugate) or Ka = Kw Kb(conjugate). Calculate the Kb for CN - . Kb( CN - ) = Kw

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Acids Lesson 12 Calculating Kbs

Acids Lesson 12 Calculating Kbs. You can calculate the Kb using the Ka from the data package page 6 and the equation below. Ka x Kb = 1.0 x 10 -14 @ 25 o C Kb = Kw Ka(conjugate) or Ka = Kw Kb(conjugate). Calculate the Kb for CN - . Kb( CN - ) = Kw

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Acid Base Class #5

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Acid-Base Indicators

Acid-Base Indicators. Measuring pH. Now that we know how to calculate pH of a solution, how do we measure it in the lab? The following slides will provide numerous examples of ways to measure pH in the laboratory. pH testing. There are several ways to test pH Blue litmus paper (red = acid)

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Thymol Blue as Indicator

Thymol Blue as Indicator. Thymol Blue: Titration of Antacid. This should be what your antacid looks like after you have added an excess of 0.2 M HCl and about 5-10 drops of thymol blue indicator. This should be what your antacid looks like after you have titrated with 0.2 M NaOH.

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