Chemistry Goal 10. Substances can be classified as acid, base, or neutral based on their pH. Acids...
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Transcript of Chemistry Goal 10. Substances can be classified as acid, base, or neutral based on their pH. Acids...
Acids, Bases, and pHChemistry Goal 10
BrainPop- Acids and Bases
Substances can be classified as acid, base, or neutral based on their pH.
Acids and bases are solutions usually with water as a solvent.
Can be identified by: ◦ Sour taste◦ Reacts with some metals◦ Reacts with bases to form a neutral pH solution◦ pH is less than 7; the lower the number, the more
acidic the solution
Acids
Can be identified by:◦ Bitter taste◦ Slippery feel◦ Reacts with acids to form a neutral pH solution◦ pH is greater than 7; the higher the number, the
more basic the solution.
Bases
Is neither an acid nor a base Pure water is neutral and has a pH near 7
Neutrals
Substances that can be used to determine whether a solution is acidic, basic, or neutral.
Indicators
Changes color in the presence of an acid or a base
Blue litmus paper turns red in an acid and stays blue in a base. ◦ BRA
Red litmus paper turns blue in a base and stays red in an acid. ◦ RBB
Litmus Paper
What Color does Litmus Paper Turn?
Test for a base ONLY Is colorless and turns magenta (bright pink)
in the presence of a base Stays colorless in acidic and neutral
solutions
Phenolphthalein
Has a range of colors depending on the pH of the solution
The color of the paper is compared to a chart to determine the actual pH number.
pH Paper
What is the pH?
A = ______
B = ______
C = ______
D = ______
Red Cabbage Juice IndicatorTest for Acids and BasesThe color of the solution is compared to a chart to determine pH
Zoom Kitchen Lab from Friday
So you think you know about acids and bases?Make a copy of the data sheet on Edmodo