Chemical Reactions: Washing Soda and Sulphuric Acid

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Questions and Answers

What is the primary gas produced during the reaction between washing soda and dilute sulfuric acid?

  • Hydrogen
  • Nitrogen
  • Carbon dioxide (correct)
  • Oxygen

What indicates that carbon dioxide is present when it bubbles through limewater?

  • The solution turns blue
  • The solution remains clear
  • The solution turns milky (correct)
  • The solution becomes colorless

What is formed when carbon dioxide reacts with limewater?

  • Sulfuric acid
  • Calcium hydroxide
  • Calcium carbonate (correct)
  • Sodium sulfate

What is the role of dilute sulfuric acid in this experiment?

<p>It reacts with washing soda to produce carbon dioxide (C)</p> Signup and view all the answers

Which chemical equation represents the reaction occurring in this experiment?

<p>Na₂CO₃ + H₂SO₄ → Na₂SO₄ + CO₂ + H₂O (C)</p> Signup and view all the answers

Flashcards

Washing Soda

Sodium carbonate, a chemical used in the reaction.

Dilute Sulfuric Acid

A weak solution of sulfuric acid used in the experiment.

Effervescent Reaction

Reaction that produces bubbles and gas, here COâ‚‚.

Limewater

A calcium hydroxide solution that tests for carbon dioxide.

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Calcium Carbonate Formation

Insouble compound formed when COâ‚‚ reacts with limewater.

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Study Notes

Chemical Reaction of Washing Soda and Sulphuric Acid

  • Washing soda (sodium carbonate) reacts with dilute sulphuric acid (Hâ‚‚SOâ‚„) to produce sodium sulphate, water, and carbon dioxide.
  • The reaction produces a colourless gas, carbon dioxide.
  • Carbon dioxide causes the limewater (calcium hydroxide) solution to turn milky, as calcium carbonate (a white precipitate) is formed.

Limewater and Carbon Dioxide

  • Limewater is a solution of calcium hydroxide.
  • When carbon dioxide gas bubbles through limewater, a white precipitate of calcium carbonate forms.
  • This makes the limewater appear milky.
  • The reaction shows that carbon dioxide is a chemical substance.

Chemical Equation

  • The chemical equation for the reaction between washing soda and dilute sulphuric acid is: Naâ‚‚CO₃ + Hâ‚‚SOâ‚„ → Naâ‚‚SOâ‚„ + Hâ‚‚O + COâ‚‚
  • The chemical equation for the reaction between carbon dioxide and calcium hydroxide is: Ca(OH)â‚‚ + COâ‚‚ → CaCO₃ + Hâ‚‚O

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