Chemistry 101: Writing + Balancing Chemical Equations (Practice)

Write and balance the chemical equation: potassium sulfite and hydrogen fluoride react to produce potassium fluoride and hydrogen sulfite

• K₂SO₃ + 2HF → 2KF + H₂SO₃

  
  

• K₂SO₃ + HF → KF + H₂SO₃

• 2K₂SO₃ + 2HF → 2KF + 2H₂SO₃

Answer explanation

Write out and balance the chemical equation: Beryllium Phosphate and Sodium Bromide react to produce Beryllium Bromide and Sodium Phosphate

• Be₃(PO₄)₂ + 6NaBr → 3BeBr + 2Na₃PO₄

• Be₂(PO₄)₃ + 3NaBr → 3Na₃PO₄ + 2BeBr₃

• BePO + NaBr → BeBr + NaPO

• Be₃(PO₄) + NaBr → BeBr + Na₃PO₄

Answer explanation

Tags

NGSS.HS-PS1-1

Write and balance the chemical equation: Lithium Iodide reacts with Radium Phosphide to produce Lithium Phosphide and Radium Iodide

• LiI + Ra₃P₂ → Li₃P + RaI₂

• 6LiI + Ra₃P₂ → 2Li₃P + 3RaI₂

• LiI + RaP → LiP + RaI

Answer explanation

Write and balance the chemical equation: Strontium Nitride and Barium Selenide react to produce Strontium Selenide and Barium Nitride

• Sr₃N₂ + BaSe → SrSe + 3BaN

• Sr₃N₂ + 3BaSe → 3SrSe + Ba₃N₂

• SrN + BaSe → SrSe + BaN

• 8Sr₃N₂ + 3BaSe → 3SrSe + 7Ba₃N₂

Answer explanation

Tags

NGSS.HS-PS1-1

Write out and balance the equation: Francium Fluoride and Rubidium Bromide react to produce Francium Bromide and Rubidium Fluoride

• FrF + RbBr → FrBr + RbF

• 2FrF + 1RbBr → 7FrBr + 3RbF

• 7Fr₂F + 7Rb₂Br → 5FrBr + Rb₉F

• 2FrF + 7RbBr → 9FrBr + 3RbF

Answer explanation

Since each cation had a +1 charge, and each anion had a -1 charge, the equation was automatically balanced