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Questions and Answers

What products are formed when zinc reacts with silver nitrate?

  • Zinc nitrate and gold
  • Silver oxide and zinc carbonate
  • Silver and zinc nitrate (correct)
  • Copper and silver nitrate

Which of the following represents the correct skeleton equation for the combustion of methane?

  • CH4(g) + O2(g) → C(g) + H2O(g)
  • CH4(g) + O2(g) → CO2(g) + H2O(g) (correct)
  • CH4(g) + O2(g) → CH4O(g) + CO2(g)
  • CH4(g) + O2(g) → CO(g) + H2O(g)

What is produced when zinc carbonate is heated?

  • Zinc oxide and water
  • Zinc and carbon dioxide
  • Zinc and zinc oxide
  • Zinc oxide and carbon dioxide (correct)

Which word equation correctly describes the reaction between nitrogen and oxygen gases?

<p>Nitrogen + oxygen → nitrogen dioxide (D)</p> Signup and view all the answers

What substances are produced by the reaction of potassium hydroxide with phosphoric acid?

<p>Water and potassium phosphate solution (A)</p> Signup and view all the answers

Flashcards

Decomposition reaction

A chemical reaction where a solid reactant is heated to produce solid and gas products.

Combination reaction

A chemical reaction where one reactant combines with another to produce a single product.

Double replacement reaction

A chemical reaction where two reactants react to form two new products.

Chemical equation

A shorthand representation of a chemical reaction using chemical formulas and symbols.

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Combustion reaction

A chemical reaction where a single reactant reacts with oxygen to produce carbon dioxide and water.

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Study Notes

Chemical Reactions

  • Welding Torch: Acetylene gas (dicarbon dihydride) and oxygen gas combine to form carbon dioxide and water vapor.

  • Word Equation: dicarbon dihydride + oxygen gas → carbon dioxide + water

  • Skeleton Equation: C2H2(g) + O2(g) → CO2(g) + H2O(g)

  • Zinc and Silver Nitrate: Zinc metal added to silver nitrate solution produces zinc nitrate solution and silver.

  • Word Equation: zinc + silver nitrate → zinc nitrate + silver

  • Skeleton Equation: Zn(s) + AgNO3(aq) → Zn(NO3)2(aq) + Ag(s)

  • Zinc Carbonate Decomposition: Heating solid zinc carbonate produces solid zinc oxide and carbon dioxide gas.

  • Word Equation: zinc carbonate → zinc oxide + carbon dioxide

  • Skeleton Equation: ZnCO3(s) → ZnO(s) + CO2(g)

  • Nitrogen and Oxygen Reaction: Nitrogen and oxygen gases react to form nitrogen dioxide.

  • Word Equation: nitrogen + oxygen → nitrogen dioxide

  • Skeleton Equation: N2(g) + O2(g) → N2O2(g)

  • Potassium Hydroxide and Phosphoric Acid: Potassium hydroxide solution and phosphoric acid react to produce water and potassium phosphate solution.

  • Word Equation: potassium hydroxide + phosphoric acid → water + potassium phosphate

  • Skeleton Equation: KOH(aq) + H3PO4(aq) → H2O(l) + K3PO4(aq)

  • Methane Combustion: Methane (natural gas) reacts with oxygen to form carbon dioxide and water vapor.

  • Word Equation: methane + oxygen → carbon dioxide + water

  • Skeleton Equation: CH4(g) + O2(g) → CO2(g) + H2O(g)

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