Fällningsreaktioner
Fällningsreaktioner, also known as precipitation reactions, are chemical processes where two solutions are mixed to form an insoluble solid, known as a precipitate. This solid typically appears as a cloudy or opaque substance in the mixture. The reaction can be represented by a chemical equation, where the products include the precipitate and possibly a soluble salt. The driving force behind a precipitation reaction is the decrease in solubility of the reactants, leading to the formation of a more stable compound.
The general form of a precipitation reaction is:
A+(aq) + B-(aq) → AB(s) + C+(aq) + D-(aq)
where A+ and B- are the ions from the reactant solutions, AB(s) is the insoluble precipitate, and
Fällningsreaktioner are commonly used in analytical chemistry for qualitative analysis, where the presence of specific ions