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Questions and Answers
What is the pH of a neutral substance?
What is the pH of a neutral substance?
What type of solutions resist changes in pH?
What type of solutions resist changes in pH?
What is the pH range of acidic solutions?
What is the pH range of acidic solutions?
What is the role of buffers in biological processes?
What is the role of buffers in biological processes?
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What is an example of a common acid?
What is an example of a common acid?
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Study Notes
Acids and Bases
- Substances can be classified as acidic, basic, or neutral based on their pH levels.
Understanding pH Scale
- The pH scale ranges from 0 to 14, with 7 being neutral.
- Acids have a pH below 7, and bases have a pH above 7.
Characteristics of Acids and Bases
- Acids: taste sour, turn blue litmus paper red, feel wet, are proton donors, and include citrus fruits, soda, and vinegar.
- Bases: taste bitter, turn red litmus paper blue, feel slippery, are proton acceptors, and include ammonia, antacids, and detergents/soaps.
Neutralization Reaction
- Acids and bases react to form water and salt, resulting in a pH of 7 (pure water).
pH Indicators
- Indicators are used to determine whether a substance is an acid or base, but do not give an exact pH value.
- Examples of indicators include litmus paper, phenolphthalein, and methyl orange.
Neutral Substances
- Neutral substances have an equal amount of hydrogen (H+) and hydroxide ions (OH-).
- Examples of neutral substances include water and human blood.
Buffers
- Buffers are solutions that resist changes in pH, composed of a weak acid and a weak base.
- Buffers play a critical role in biological processes, such as maintaining a stable pH in the blood.
Uses of Acids, Bases, and Neutral Solutions
- Acids, bases, and neutral substances have various uses in medicine, industry, and everyday life.
- Examples include sulfuric acid in chemotherapy, lactic acid in skin products, and sodium hydroxide in soap production.
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Description
Test your knowledge of acids and bases, pH levels, and household examples of acidic and basic substances. Learn about their properties and characteristics.
