Precipitation reaction. Iron (III) hydroxide (brown) being precipitated from a solution by the addition of sodium hydroxide from a dropper (top). Precipitation occurs when an insoluble salt is formed by a reaction. In this case,a solution of iron (III) chloride (FeCl3,yellow) reacts with the sodium hydroxide (NaOH) to form insoluble iron (III) hydroxide (Fe(OH)3) and soluble sodium chloride,or table salt (NaCl) | |
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Crédit: | Science Photo Library / Andrew Lambert Photography |
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