deposition

(noun)

A phase transition in which a gas is converted to solid, without passing though an intermediate liquid phase. It is the reverse process of sublimation.

Related Terms

Examples of deposition in the following topics:

  • Electrolysis Stoichiometry

    • Thus, one mole of V3+ corresponds to three equivalents of this species, and will require three faradays of charge to deposit it as metallic vanadium ($V^{3+} + 3e^- \rightarrow V$).
    • What mass of copper will be deposited if a current of 0.22 amp flows through the cell for 1.5 hours?
    • How many amps would it take to deposit 0.39 grams of Cu in 1.5 hours?

  • Measuring Radiation Exposure

    • Radiation dose refers to the amount of energy deposited in matter and/or biological effects of radiation.
    • Dose is a measure of deposited dose, and therefore can never go down.

  • Solid to Gas Phase Transition

    • The reverse process of sublimation is deposition (i.e., gas to solid).

  • Oxidation

    • When silver cation is the oxidant, as in the above equation, it is reduced to metallic silver in the course of the reaction, and this deposits as a beautiful mirror on the inner surface of the reaction vessel.

  • Occurrence of Metals

    • Metals that can be found as native deposits singly and/or in alloys include antimony, arsenic, bismuth, cadmium, chromium, cobalt, indium, iron, nickel, selenium, tantalum, tellurium, tin, titanium, and zinc.
    • Ore is located by prospecting techniques, followed by the exploration and examination of deposits.

  • Voltaic Cells

    • This forms a solid metal that deposits on the cathode.
    • During the reaction, the zinc electrode will be used and the metal will shrink in size, while the copper electrode will become larger due to the deposited Cu that is being produced.

  • Predicting the Products of Electrolysis

    • We notice that the the initial blue color of the solution remains unchanged, but it appears that copper has been deposited on one of the electrodes but dissolved on the other.
    • This is because Cu2+ ions are attracted to the negatively charged cathode, and since the the cathode is putting out electrons, the Cu2+ becomes reduced to form copper metal, which is deposited on the electrode.

  • Strong Acid-Strong Base Titrations

    • The reactant of unknown concentration is deposited into an Erlenmeyer flask and is called the analyte.

  • Iron, Cobalt, Copper, Nickel, and Zinc

    • Like nickel, cobalt in the Earth's crust is found only in chemically combined form, save for small deposits found in alloys of natural meteoric iron.

  • Naming Familiar Inorganic Compounds

    • Smoke from burning camel dung (the staple fuel of North Africa) condenses on cool surfaces to form a crystalline deposit, which the ancient Romans first noticed on the walls and ceiling of the temple that the Egyptians had built to the sun god Amun in Thebes.