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Red Cabbage Red Cabbage as a as a
pH Indicator pH Indicator
I N T R O D U C T I O NI N T R O D U C T I O NThe concentration of hydrogen ions is called the pH scale.
Low pH corresponds to high hydrogen ion concentration and vice versa. An acid is a substance that when added to water increases the concentration of hydrogen ions (lowers the pH). A substance that reduces the concentration of hydrogen ions (raises the pH) is called a base.
T H ET H Ep H S C A L Ep H S C A L E
The pH scale measures from pH 1 to pH 14. If a substance has a pH of 1-5, it is an acid. If a substance has a pH of 6-7, it is neutral. And finally, if a substance has a pH of 8-14, it is a base. A pH of 1-3 or 12-14 is considered to be a strong acid or base.
M A T E R I A L SM A T E R I A L S •Two heads of red cabbage
•A blender, chopper, or grater.
•At least 7 beakers (w/ measurements on the side)
•Medicine droppers
•Medicine cups (or small container w/ metric measurements)
•An orange, sparkling water, shampoo, vinegar( optional-you can use vinegar that has been dissolved in distilled water), baking soda, laundry detergent ( preferably powder), aspirin (100mg tablets), red grapes, blueberries, blackberries, carrots, bar soap, red onions,
•An unlimited supply of water
R E D C A B B A G E R E D C A B B A G E C O L O R S C A L EC O L O R S C A L E
R E D C A B B A G E R E D C A B B A G E C O L O R S C A L EC O L O R S C A L E(By: B. Jackson and K. Glenn)(By: B. Jackson and K. Glenn)
O T H E R O T H E R p H I N D I C A T O R Sp H I N D I C A T O R S
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P R O C E D U R E S1. .
B L U E B E R R Y B L U E B E R R Y R E S U L T SR E S U L T S
B L A C K B E R R Y B L A C K B E R R Y R E S U L T SR E S U L T S
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