4.2.1 Reactions of acids with metals

• Acids have a sweet taste.

  False
• Arrange the following metals in order of decreasing reactivity based on the metal reactivity series.

  1️⃣ Potassium

  2️⃣ Sodium

  3️⃣ Calcium

  4️⃣ Magnesium

  5️⃣ Zinc

  6️⃣ Iron

  7️⃣ Copper
• What is the product formed when acids react with metals?

  Salt and hydrogen gas
• Match the metal with its reactivity level according to the metal reactivity series.

  Potassium ↔️ High

  Calcium ↔️ Moderate

  Iron ↔️ Low

  Copper ↔️ Very low
• The metal reactivity series helps determine which metals react more readily with acids
• In the reaction between acids and metals, the metal loses electrons and is oxidized.


  True
• What is the balanced chemical equation for the reaction between zinc and hydrochloric acid?

  Zn + 2HCl → ZnCl₂ + H₂
• What are the two products formed when a metal reacts with an acid?

  Salt and hydrogen gas
• Acids have a pH less than 7
• Metals are reactive and can lose electrons to form positive ions
• In the reaction between acids and metals, the metal is oxidized and the acid is reduced.


  True
• Acids typically have a pH less than 7
• Arrange the following metals in order of increasing reactivity based on the metal reactivity series.

  1️⃣ Copper

  2️⃣ Iron

  3️⃣ Zinc

  4️⃣ Magnesium

  5️⃣ Calcium

  6️⃣ Sodium

  7️⃣ Potassium
• In the reaction between acids and metals, the acid gains electrons and is reduced.


  True
• Arrange the general reaction between acids and metals:

  1️⃣ Acid reacts with metal

  2️⃣ Salt is formed

  3️⃣ Hydrogen gas is produced
• Copper is the least reactive metal in the metal reactivity series.


  True
• Sodium is more reactive than calcium in the metal reactivity series.


  True
• Match the metal with its reactivity level:

  Potassium ↔️ High

  Calcium ↔️ Moderate

  Iron ↔️ Low

  Copper ↔️ Very low
• What ion is released when an acid is dissolved in water?

  Hydrogen ion (H+)
• What are the key properties of metals that make them useful?

  Shiny, malleable, ductile
• A metal is typically shiny, malleable, ductile, and a good conductor of heat and electricity
• What happens to the metal during the reaction with an acid?

  It is oxidized
• The common metals that react with acids are those that are more reactive
• What is the correct way to add acids to water?

  Add acid slowly to water
• What acid reacts with magnesium to produce magnesium sulfate and hydrogen gas?

  Sulfuric acid
• What salt is formed when hydrochloric acid reacts with zinc?

  Zinc chloride
• Acids have a pH typically less than 7
• Match the metal characteristic with its description:

  Reactivity ↔️ Ability to lose electrons

  Electronegativity ↔️ Low compared to hydrogen

  Electron configuration ↔️ Valence electrons easily removed
• Acids react with metals to produce salt and hydrogen gas


  True
• Arrange the metals in order of their reactivity from highest to lowest:

  1️⃣ Potassium

  2️⃣ Sodium

  3️⃣ Calcium

  4️⃣ Magnesium

  5️⃣ Zinc

  6️⃣ Iron

  7️⃣ Copper
• What are the main products formed when an acid reacts with a metal?

  Salt and hydrogen gas
• In case of acid exposure, flush the affected area with large amounts of water

  True
• Arrange the metals in order of their reaction with hydrochloric acid from most vigorous to least vigorous:

  1️⃣ Magnesium

  2️⃣ Zinc

  3️⃣ Iron

  4️⃣ Copper
• What is the definition of an acid?

  Releases H+ in water
• What are the key properties of metals?

  Shiny, malleable, ductile
• What is the general reaction equation between acids and metals?

  Acid + Metal → Salt + Hydrogen Gas
• Provide an example of a reaction between a metal and an acid.

  Zn + 2HCl → ZnCl₂ + H₂
• In the reaction between acids and metals, the metal gains electrons.

  False
• In the reaction between acids and metals, which substance is oxidized?

  The metal
• Match the metal with its reactivity level according to the series:

  Potassium ↔️ High

  Calcium ↔️ Moderate

  Zinc ↔️ Low

  Copper ↔️ Very low