Indicators
We use indicators to, you guessed it, INDICATE. These indicators are indicating whether or not something is an acid or a base along with (for some of them) the strength of that acid/base. Some indicators are
Red Litmus Paper- Will turn red if an acid and blue if a base
Blue Litmus Paper- Will turn red if an acid and blue if a base
Ph strip- Piece of paper that indicates an acid's or base's pH via ROYBI. If the paper turns is red or orange then we know that the liquid is an acid. If the paper is yellow than the solution is neutral (ph of 7). If the pH is 8-14 then the paper will be blue or indigo.
Universal Indicator- Will turn acids red, orange, or yellow, will be green if neutral, will turn bases blue, indigo, or violet (Hint* remember ROYGBIV and you will always know how to use a universal indicator)
Phenolphthalein- Turns strong bases bright pink and colorless if an acid
Red Litmus Paper- Will turn red if an acid and blue if a base
Blue Litmus Paper- Will turn red if an acid and blue if a base
Ph strip- Piece of paper that indicates an acid's or base's pH via ROYBI. If the paper turns is red or orange then we know that the liquid is an acid. If the paper is yellow than the solution is neutral (ph of 7). If the pH is 8-14 then the paper will be blue or indigo.
Universal Indicator- Will turn acids red, orange, or yellow, will be green if neutral, will turn bases blue, indigo, or violet (Hint* remember ROYGBIV and you will always know how to use a universal indicator)
Phenolphthalein- Turns strong bases bright pink and colorless if an acid
Next we will learn about pH and pOH. Click here to begin!
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