Podcast
Questions and Answers
Why should magnesium ribbon be cleaned before burning it in air?
Why should magnesium ribbon be cleaned before burning it in air?
- To prevent the formation of magnesium oxide.
- To ensure faster reaction by removing impurities. (correct)
- To allow more air to enter the ribbon.
- To reduce the temperature of the magnesium ribbon.
What is the balanced equation for the reaction of sodium with water?
What is the balanced equation for the reaction of sodium with water?
- Na + H_2O → NaOH + H_2
- 2Na + 2H_2O → NaOH + H_2
- Na + 2H_2O → 2NaOH + H_2
- 2Na + H_2O → 2NaOH + H_2 (correct)
What causes the color change in copper sulfate solution when an iron nail is placed in it?
What causes the color change in copper sulfate solution when an iron nail is placed in it?
- Copper reacts with oxygen from the air.
- Copper ions are reduced by hydrogen.
- Iron displaces copper due to its higher reactivity. (correct)
- Iron becomes oxidized to form FeSO_4.
Which substance is oxidized in the reaction: $CuO + H_2
ightarrow Cu + H_2O$?
Which substance is oxidized in the reaction: $CuO + H_2 ightarrow Cu + H_2O$?
What is the product formed when calcium oxide reacts with water?
What is the product formed when calcium oxide reacts with water?
Flashcards
Why clean magnesium ribbon before burning?
Why clean magnesium ribbon before burning?
To remove surface impurities (oxides) for faster reaction.
Hydrogen chloride + Chlorine equation
Hydrogen chloride + Chlorine equation
H₂ + Cl₂ → 2HCl (Balanced).
Barium Chloride + Aluminum Sulphate equation
Barium Chloride + Aluminum Sulphate equation
BaCl₂ + Al₂(SO₄)₃ → BaSO₄ + 2AlCl₃
Sodium + Water equation
Sodium + Water equation
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Substance for white washing
Substance for white washing
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Gas collected in Activity 1.7 (double)
Gas collected in Activity 1.7 (double)
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Copper sulphate color change reason
Copper sulphate color change reason
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Example of double displacement reaction (other)
Example of double displacement reaction (other)
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Oxidation in 2Na + O₂ → 2Na₂O
Oxidation in 2Na + O₂ → 2Na₂O
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Reduction in CuO + H₂ → Cu + H₂O
Reduction in CuO + H₂ → Cu + H₂O
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