Confirmatnion for silver Qual 1
2
B. Confirmation of Silver (Ag + ) Silver forms a soluble complex ion with aqueous ammonia. The presence of silver is confirmed by dissolving any remaining solid residue in 6 M NH 3 (aq) and then re-precipitating the chloride by freeing the silver ion from the complex ion using 6 M acid Two solids together***** ??????? Add ~5 drops of 6 M NH 3 (aq) to the solid from A, keeping your test tube near the inlet of the fume exhaust vent. The solid should dissolve, but if any precipitate remains, centrifuge and
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Transcript of Confirmatnion for silver Qual 1
B. Confirmation of Silver (Ag+)Silver forms a soluble complex ion with aqueous ammonia. The presence of silver is confirmed by dissolving any remaining solid residue in 6 M NH3 (aq) and then re-precipitating the chloride by freeing the silver ion from the complex ion using 6 M acid
Two solids together*****
???????
Add ~5 drops of 6 M NH3 (aq) to the solid from A, keeping your test tube near the inlet of the fume exhaust vent. The solid should dissolve, but if any precipitate remains, centrifuge and proceed using only the centrifugate. Add 6 M HNO3 to the solution until the
solution is acidified, using pH indicator paper to test for acidification. A white precipitate (AgCl) confirms the presence of Ag+. The Cl- needed for precipitation will be present from the prior dissolution of AgCl
