Acids, carbonates, and metals

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Questions and Answers

Which gas is produced when hydrochloric acid reacts with magnesium?

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

Carbon dioxide makes limewater solution turn clear.

False (B)

What is the chemical formula for carbon dioxide?

CO2

If a glowing splint relights in a test tube, the gas is __________.

<p>oxygen</p> Signup and view all the answers

Match the gas with its corresponding test result:

<p>Hydrogen = Squeaky pop with a lighted splint Carbon Dioxide = Turns limewater milky Oxygen = Relights a glowing splint</p> Signup and view all the answers

What type of chemical reaction occurs when calcium carbonate neutralizes an acid?

<p>Neutralization (D)</p> Signup and view all the answers

To test for hydrogen gas, you should extinguish a lit splint into the gas.

<p>False (B)</p> Signup and view all the answers

What two substances react to produce magnesium chloride and hydrogen?

<p>Magnesium and hydrochloric acid</p> Signup and view all the answers

Hydrochloric acid reacts with calcium carbonate to produce calcium chloride, water, and __________.

<p>carbon dioxide</p> Signup and view all the answers

Which of the following describes the correct procedure to test for oxygen gas?

<p>Insert a glowing splint into the gas. If the splint relights, oxygen is present. (D)</p> Signup and view all the answers

Flashcards

Hydrochloric acid + Calcium carbonate

Reactants: Hydrochloric acid and Calcium carbonate. Products: Calcium chloride, water and carbon dioxide.

Magnesium + Hydrochloric acid

Reactants: Magnesium and Hydrochloric acid. Products: Magnesium chloride and Hydrogen.

Test for Carbon Dioxide

Bubble the gas through limewater solution. If the limewater turns milky/cloudy, carbon dioxide is present.

Test for hydrogen

Collect gas, light a splint, place in test tube. A squeaky pop indicates hydrogen.

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Test for oxygen

Collect gas, light and extinguish a splint, leaving a glowing splint. Place in test tube. If the splint relights, the gas is oxygen.

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Acids + Carbonates ->

Acids react with carbonates to produce this gas.

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Acids + Metals ->

Acids react with some metals to make this gas.

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Carbon dioxide + ______ -> milky

Carbon dioxide turns this solution milky or cloudy.

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Gas with a squeaky pop

This gas extinguishes a lighted splint with a 'squeaky pop'.

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Gas that relights a glowing splint

This gas relights a glowing splint.

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Study Notes

  • Acids reacting with indigestion tablets in water produce bubbles
  • Indigestion tablets contain calcium carbonate
  • Calcium carbonate neutralizes acid in a chemical reaction
  • Carbon dioxide gas is a product of this reaction; its formula is COâ‚‚

Reaction Example

  • Hydrochloric acid reacts with calcium carbonate to make calcium chloride, water, and carbon dioxide

Testing for Carbon Dioxide

  • Bubble the gas through limewater solution
  • If limewater turns milky or cloudy, carbon dioxide is present

Acids and Metals

  • Some metals react with acids
  • Hydrochloric acid reacts with magnesium
  • Hydrogen gas (Hâ‚‚) is produced when hydrochloric acid reacts with magnesium

Reaction Example

  • Magnesium reacts with hydrochloric acid to make magnesium chloride and hydrogen

Testing for Hydrogen Gas

  • Collect the gas by holding an empty test tube above the reaction
  • Light a splint, and place the lighted splint in the gas test tube
  • If a squeaky pop is heard, the gas is hydrogen

Testing for Oxygen Gas

  • Collect the gas by holding an empty test tube above the reaction
  • Light a splint and blow it out
  • Place the glowing splint in the gas
  • If glowing splint relights, the gas is oxygen

Key Points

  • Acids react with carbonates to make carbon dioxide gas
  • Acids react with some metals to make hydrogen gas
  • Carbon dioxide makes limewater milky
  • Hydrogen extinguishes a lighted splint with a squeaky pop
  • Oxygen relights a glowing splint

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