Ammonia Gas and Ammonium Ions Test

• What is the test for ammonia gas?

  Red litmus paper turns blue
• What is the test for ammonium ions?

  Ammonium ions react with hydrogen to form water and ammonia gas

  Ammonia gas will turn red litmus paper blue
• What is the formula for the test for ammonium ions?

  NH4+(aq) + OH-(aq) -> NH3(g) + H20(l)