Chemistry Forum

Hi. I need to write balanced equations for the following reactions.
hydrogen and potassium, hydrogen and fluorine, hydrogen and sulfur, white phosphorus with excess bromine, and excess white phosphorus with oxygen. Thanks!

Hydrogen + Potassium
H₂ + 2K -> 2KH

Hydrogen + Fluorine
H₂ + F₂ -> 2HF

Hydrogen + Sulfur
H₂ + S -> H₂S

White Phosphorus with Excess Bromine
P₄ + 6Br₂ -> PBr₃ (+ Any unreacted Br₂)
OR
P₄ + 10Br₂ -> PBr₅ (+ Any unreacted Br₂)
(both possible depending on conditions and temperature also above 100 degrees C PBr₅ decays to PBr₃)

White Phosphorus + Oxygen
P₄ + 5o2 -> P₄O₁₀ (+ Any unreacted P₄)