3.2 Reactions of Acids

• Acids have a sour taste.

  True
• The pH of acids is less than 7
• The reaction of hydrochloric acid with zinc produces zinc chloride and hydrogen gas.


  True
• When acids react with metal carbonates, they produce salt, water, and carbon dioxide
• What do acids produce when dissolved in water?

  Hydrogen ions (H⁺)
• What is produced when acids react with metal carbonates?

  Salt, CO₂, and water
• What three products are formed when acids react with metal carbonates?

  Salt, carbon dioxide, water
• What type of salt is formed when hydrochloric acid reacts with a metal carbonate?

  Metal chloride
• Match the component with its description:

  Acids ↔️ Donate H⁺ ions

  Alkalis ↔️ Release OH⁻ ions

  Neutralization ↔️ Salt and water formed
• What is the balanced chemical equation for the reaction between hydrochloric acid and sodium hydroxide?

  HCl(aq) + NaOH(aq) → NaCl(aq) + H₂O(l)
• Steps for balancing a chemical equation for an acid reaction:

  1️⃣ Identify the reactants and products

  2️⃣ Determine the elements that need to be balanced

  3️⃣ Balance H and O atoms by adjusting H₂O coefficients

  4️⃣ Balance other elements by adjusting their coefficients

  5️⃣ Ensure the number of atoms is the same on both sides
• Acids are substances that produce hydrogen ions ($H^ +$) when dissolved in water
• Acids are good conductors of electricity.


  True
• When acids react with metals, the products are a salt and hydrogen gas
• The reaction of hydrochloric acid with zinc oxide produces zinc chloride and water.


  True
• Neutralization reactions occur when acids react with alkalis, resulting in the formation of a **salt** and water.
• When acids react with metal oxides, they produce **salts** and water.
• Neutralization reactions with alkalis produce hydrogen gas.

  False
• The general reaction equation for the reaction between an acid and a metal carbonate is: Acid + Metal Carbonate → Salt + Carbon Dioxide + Water
• What is the balanced chemical equation for the reaction between hydrochloric acid and zinc carbonate?

  2HCl(aq) + ZnCO₃(s) → ZnCl₂(aq) + CO₂(g) + H₂O(l)
• During neutralization reactions, acids donate H⁺ ions, while alkalis release OH⁻ ions.
• When phenolphthalein is added to a solution with a pH of 9, the solution turns pink.
• The balanced equation for the reaction between hydrochloric acid and zinc is 2HCl + Zn → ZnCl₂ + H₂

  True
• When acids react with metals, they produce hydrogen gas
• Why do acids react with metals to produce hydrogen gas?

  Hydrogen ions oxidize metal atoms
• When acids react with metal oxides, they produce salts and water
• Events of acid reactions with metal carbonates

  1️⃣ Acid donates hydrogen ions

  2️⃣ Carbonate ions react with hydrogen ions

  3️⃣ Water and carbon dioxide are formed

  4️⃣ Salt is produced
• Acids produce hydrogen gas when they react with metals.

  True
• Match the acid property with its description:

  Taste ↔️ Sour

  Reaction with metals ↔️ Produce hydrogen gas

  Electrical conductivity ↔️ Good conductors

  pH ↔️ Less than 7
• The reaction between an acid and a metal carbonate produces water.

  True
• Neutralization reactions are crucial for maintaining pH balance in chemical processes.

  True
• Match the indicator with its color in acid and base:

  Litmus ↔️ Red in acid, Blue in base

  Methyl Orange ↔️ Red in acid, Yellow in base

  Phenolphthalein ↔️ Colorless in acid, Pink in base
• What is the unbalanced equation for the reaction between hydrochloric acid and zinc?

  HCl + Zn → ZnCl₂ + H₂