Five test tubes without labels contain solutions of hydroxide, sulfide, chloride, sodium iodide and ammonia.
| March 18, 2021 | education
Five test tubes without labels contain solutions of hydroxide, sulfide, chloride, sodium iodide and ammonia. How to identify these substances with one additional reagent. Give the reaction equations.
Silver nitrate.
2AgNO3 + 2NaOH = Ag2O + 2NaNO3 + H2O (brown silver oxide precipitate)
2AgNO3 + 2NaS = Ag2S + 2NaNO3 (black precipitate of silver sulfide)
AgNO3 + NaСl = NaNO3 + AgCl (white curdled precipitate)
AgNO3 + NaI = NaNO3 + AgI (yellow precipitate)
2AgNO3 + 4NH4OH = [Ag (NH3) 2] 2O + 2NH4NO3 + 2H2O (the precipitate is dissolved in an excess of ammonia water)
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