Intermediate Topic 681 of 1102 Inorganic Chemistry
Silver Chemistry
Silver halides are light sensitive, the basis of traditional photography.
In-depth explanation of Silver Chemistry
Silver is a noble metal with the highest electrical and thermal conductivity of any element. Its common oxidation state is +1, and the halides AgCl, AgBr and AgI are sparingly soluble, with solubility decreasing from chloride to iodide. AgCl is white, AgBr pale cream and AgI yellow, and they darken in light because silver ions are reduced to metallic silver. This light sensitivity is the basis of traditional photographic film. Silver chloride dissolves in aqueous ammonia to form a diamminesilver(I) complex, while silver iodide does not.
Going deeper: Silver Chemistry
Key ideas: Ag shows mostly +1, with AgNO3 soluble but AgCl (white), AgBr (pale yellow), AgI (yellow) insoluble, Ksp decreasing from 1.8e-10 for AgCl to 8.5e-17 for AgI. AgCl dissolves in NH3 as [Ag(NH3)2]+, AgBr only in concentrated, AgI in neither but in thiosulfate or cyanide. Tollens reagent is ammoniacal silver nitrate, which gives a mirror with aldehydes. Photographic film uses light sensitivity of AgBr.
Common mistakes and connections: Students confuse AgCl dissolving in ammonia with dissolving in acid; chloride precipitate is reversible by complexation, not by pH. Silver tarnish is Ag2S from H2S, not oxide. Halide confirmatory tests follow solubility in NH3. Links to Ksp, complex ion equilibria, qualitative analysis and Tollens test.
Visualization of Silver Chemistry
Solubility products of silver halides fall by orders of magnitude from AgCl to AgI, so iodide is the least soluble and does not dissolve in ammonia. The interactive lesson shows this as a live animation or chart.
Worked example and use case
Silver chloride dissolves in dilute ammonia, while silver iodide remains as a yellow solid.
Frequently asked questions about Silver Chemistry
What is Silver Chemistry?
Silver halides are light sensitive, the basis of traditional photography.
Is Silver Chemistry a beginner, intermediate or advanced topic?
Silver Chemistry is a intermediate topic in Inorganic Chemistry. It builds on the vocabulary of beginner topics in this area.
What should I learn before Silver Chemistry?
Study these earlier topics in Inorganic Chemistry first: Zinc Chemistry, Chromium Compounds, Potassium Permanganate.
What comes after Silver Chemistry?
The next topics in Inorganic Chemistry are Gold and Platinum and Mercury.
Can I practise Silver Chemistry with quizzes?
Yes. The interactive lesson includes a self-check question on Silver Chemistry, and the Inorganic Chemistry quiz draws on every topic in this area.
Where Silver Chemistry fits in Inorganic Chemistry
Silver Chemistry is topic 66 of 113 in Inorganic Chemistry.