Draw contrast matrix on acid and base on given parameter – Taste, Litmus test, Nature, pH example (Any 3)
Acids and bases exhibit distinct properties. Acids typically have a sour taste, while bases are bitter and feel soapy to touch. Regarding the litmus test, acids turn blue litmus paper red, indicating their acidic nature. In contrast, bases turn red litmus paper blue. For pH examples, acids have a pH value less than 7, such as lemon juice (approx. pH 2.5). Bases, however, possess a pH value greater than 7, for instance, baking soda solution (approx. pH 9), clearly distinguishing them.
Explanation
To draw a contrast matrix (table) for acid and base based on the given parameters, you would set up a table with 'Parameter' as the first column, 'Acid' as the second column, and 'Base' as the third column. Then, fill in the contrasting characteristics for each parameter:
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Taste:
- Acid: Generally tastes sour (e.g., lemon, vinegar). Important Note: Never taste unknown chemicals.
- Base: Generally tastes bitter and feels soapy to touch (e.g., baking soda solution). Important Note: Never taste unknown chemicals.
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Litmus test:
- Acid: Turns blue litmus paper red.
- Base: Turns red litmus paper blue.
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Nature:
- Acid: Are acidic substances. They can be corrosive. In aqueous solutions, they typically produce hydrogen ions (H+).
- Base: Are basic or alkaline substances. They can be caustic. In aqueous solutions, they typically produce hydroxide ions (OH-).
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pH example (Any 3): The pH scale measures the acidity or alkalinity of a solution. A pH of 7 is neutral, less than 7 is acidic, and greater than 7 is basic.
- Acid: Have a pH value less than 7.
- Examples: Lemon juice (pH ~2-3), Vinegar (pH ~2.5-3.5), Stomach acid (pH ~1.5-3.5).
- Base: Have a pH value greater than 7.
- Examples: Baking soda solution (pH ~8-9), Soap solution (pH ~9-10), Household bleach (pH ~12-13).
- Acid: Have a pH value less than 7.