Podcast
Questions and Answers
Vanilla essence and clove oil can be used to check their ______.
Vanilla essence and clove oil can be used to check their ______.
odour
Take some dilute ______ solution in a test tube and dilute NaOH solution in another to test for odors.
Take some dilute ______ solution in a test tube and dilute NaOH solution in another to test for odors.
HCl
Dilute NaOH solution is a dilute ______ solution.
Dilute NaOH solution is a dilute ______ solution.
base
Vanilla, onion, and clove can be used as ______ indicators.
Vanilla, onion, and clove can be used as ______ indicators.
Activity 2.3 needs the teacher's ______.
Activity 2.3 needs the teacher's ______.
Take about 5 mL of dilute ______ acid in a test tube.
Take about 5 mL of dilute ______ acid in a test tube.
Add a few pieces of ______ granules to the test tube.
Add a few pieces of ______ granules to the test tube.
Pass the gas being evolved through the ______ solution.
Pass the gas being evolved through the ______ solution.
Take a burning ______ near a gas-filled bubble to test the gas.
Take a burning ______ near a gas-filled bubble to test the gas.
Repeat the activity with acids like HCl, $HNO_3$ and $______$.
Repeat the activity with acids like HCl, $HNO_3$ and $______$.
Flashcards
Olfactory indicators
Olfactory indicators
Substances used to test pH by their smell change.
Acid-base reaction with metals
Acid-base reaction with metals
Reaction where acids react with metals to produce hydrogen gas and a salt.
Hydrogen gas test
Hydrogen gas test
The presence of hydrogen is tested by burning it; it produces a 'pop'.
Chemical reaction observation
Chemical reaction observation
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Dilute HCl solution
Dilute HCl solution
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Clove oil
Clove oil
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Vanilla essence
Vanilla essence
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Reaction with zinc granules
Reaction with zinc granules
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Soap solution in gas test
Soap solution in gas test
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Acids and bases
Acids and bases
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Study Notes
Acid and Base Reactions with Metals
- Activity 2.3: This experiment requires teacher assistance.
- Set up apparatus as in Figure 2.1
- Add 5 mL dilute sulfuric acid to a test tube.
- Introduce zinc granules.
- Observe the zinc granules' surface.
- Pass evolved gas through soap solution.
- Note bubble formation.
- Bring a lit candle near a soap bubble to observe.
- Repeat with other acids (e.g., HCl, HNO₃, CH₃COOH).
- Compare observations for each acid.
- Note if observations are similar or different.
Olfactory Indicators
- Vanilla, onion, and clove can be used as olfactory indicators.
- Test the odor of dilute vanilla/clove oil with dilute HCl and dilute NaOH.
- Record any changes in odor.
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