Published on March 1, 2014
Learning Goals: To understand how a pH indicator works To know a variety of pH indicators
Hydrochloric Acid H+ H+ Cl Cl Cl H+ All acids contain (H+) in solution. pH is a fancy measure of the number of H+ ions in solution (but backward) What will sort of number will an acid with lots of H+ give us?
Sulphuric Acid SO4 H+ All acids contain (H+) in solution. H+ H+ H+ SO4 H+ SO4 H+ Is the pH of this acid higher than HCl? More H+ ions means a stronger acid?
Hydrochloric Acid H+ H+ Cl Cl Cl H+ Indicators detect H+ ions H+ ions change the shape of the indicator molecule A different shaped molecule means a different colour
DILUTE Cl H+ H+ Cl Has the number of H+ ions changed? Has the pH changed? Cl H+
CONCENTRATED Has the number of H+ ions changed Has the pH changed? Cl H+ Cl H+ H+ Cl
Red in acid Litmus Blue in alkali Phenolphthalein Colourless in acid Pink/Red in alkali
Bromothymol Blue Yellow in acid Blue in alkali Red in acid Methyl Orange Orange in alkali
Explain what the following litmus test tells you about the solution in the test tube alkali ?
What does the following litmus test tells you about the solution in the test tube acid ?
Explain what the following litmus test tells you about the solution in the test tube acid ?
What does the following litmus test tells you about the solution in the test tube alkali ?
Textbook: Read p220 P222 Q6
Define indicator. indicator synonyms, indicator pronunciation, indicator translation, English dictionary definition of indicator. n. 1.
Indicator definition, a person or thing that indicates. See more. Dictionary.com; Word of the Day; Translate; Games; Blog; Thesaurus.com; Apps Favorites ...
Look up Indicator, indicator, or indicators in Wiktionary, the free dictionary. Indicator may refer to: Chemistry. Indicators are substances ...
This is the definition of an indicator in chemistry.
Theory. In and of themselves, pH indicators are frequently weak acids or weak bases. The general reaction scheme of a pH indicator can be formulated as:
Learn about what an acid-base indicator is and choose an acid-base indicator from this comprehensive table of acid-base indicators, based on pH ...
In contrast, a comparable sustainability indicator is the Index of Sustainable Economic Welfare. In order to get a more complete picture of what is ...
Definition of indicator. 1: a sign that shows or suggests the condition or existence of something . 2: a pointer on a dial or scale . 3: 1 dial 3, gauge.
Definition of indicator: Data which provides information about or predicts the overall health of the economy or the financial markets; examples are...
Definition of indicator: Measurable variable used as a representation of an associated (but non-measured or non-measurable) factor or quantity.