1. Acids and Basesa. How reliable are the indicators (red cabbage and phenolphthalein) in the testing of these household substances? b. Suggest how these tests be converted to specific (numeric) pH values. Results (Data):SubstanceRed cabbagePhenolphthaleinAcid/BaseLemon juiceLight RedNo color changeAcidVinegarRedNo color changeAcidWindow CleanerGreenish-BlueVioletBaseToilet CleanerPurpleNo color changeAcidBaking sodaBlueLight PinkBaseBaking powderBlueNo color changeBaseNaCl (table salt)Bluish-PurpleNo color changeNeutralMilkLight PurpleNo color changeNeutralUnknown #1BlueNo color changeNeutralUnknown #2Bluish-GreenLight PinkBaseUnknown #3RedNo color changeAcid

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1. Acids and Bases a. How reliable are the indicators (red cabbage and phenolphthalein) in the testing of these household substances?

Principles Of Pharmacology Med Assist

6th Edition

ISBN:9781337512442

Author:RICE

Publisher:RICE

Chapter8: Forms Of Drugs And How They Act

Section: Chapter Questions

Problem 30RQ

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Question

1. Acids and Bases

a. How reliable are the indicators (red cabbage and phenolphthalein) in the testing of these household substances?

b. Suggest how these tests be converted to specific (numeric) pH values.

Results (Data):
Substance
Red cabbage
Phenolphthalein
Acid/Base
Lemon juice
Light Red
No color change
Acid
Vinegar
Red
No color change
Acid
Window Cleaner
Greenish-Blue
Violet
Base
Toilet Cleaner
Purple
No color change
Acid
Baking soda
Blue
Light Pink
Base
Baking powder
Blue
No color change
Base
NaCl (table salt)
Bluish-Purple
No color change
Neutral
Milk
Light Purple
No color change
Neutral
Unknown #1
Blue
No color change
Neutral
Unknown #2
Bluish-Green
Light Pink
Base
Unknown #3
Red
No color change
Acid

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