year 9 formation of hydrogen halides

• What is formed when hydrogen reacts with halogens?

  Hydrogen halides
• What happens to the name of halogens when forming hydrogen halides?

  The ending changes from ine to IDE
• What is the product of hydrogen reacting with chlorine?

  Hydrogen chloride
• How do you write the word equation for hydrogen and bromine?

  Hydrogen + Bromine → Hydrogen Bromide
• What is the general formula for hydrogen halides?

  H + X
• Why is hydrogen always diatomic?

  It exists in pairs as H2
• How do you balance the equation for hydrogen and chlorine?

  Add a coefficient of 2 in front of HCl
• What is the balanced equation for hydrogen and fluorine?

  H2 + F2 → 2 HF
• What happens when hydrogen halides dissolve in water?

  They dissociate into ions
• What ions are produced when hydrogen chloride dissolves in water?

  2 Cl⁻ ions and 2 H⁺ ions
• Why does the solution become acidic when hydrogen halides are dissolved in water?

  Because of the presence of H⁺ ions
• What is the name of HCl when dissolved in water?

  Hydrochloric acid
• What is the product when hydrogen reacts with iodine?

  Hydrogen iodide
• What is the balanced equation for hydrogen and bromine?

  H2 + Br2 → 2 HBr
• Why does universal indicator turn red when hydrogen fluoride is dissolved in water?

  It contains H⁺ ions making it acidic
• What is the chemical equation for hydrogen and fluorine?

  H2 + F2 → 2 HF
• What happens to universal indicator when hydrogen chloride is dissolved in water?

  It turns red due to acidity