@chemtales8: Testing for Nitrate Ions Add NaOH and aluminum foil and heat it. Make sure to put a damp red litmus paper on it. If there's nitrate, ammonia gas will form and turn the litmus paper blue . #nitrate #chemistry #igcse #qualitativeanalysismethod #qualitativeanalysis #saltidentification #educational #stem #0620 #cambridge #learningisfun #gas #ammonia #testing #paper6 #paper5 #practical #chemistrytest #chemistrylab #chemistryigcse #fyp