Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Molalities pure metal

As we have already seen, the standard potentials are relative to standard reference conditions—i.e., one-molal solutions at 2) = 25 °C and /) = 1 bar, in equilibrium with pure metals or pure gases. Applying the Nernst relation to a redox equilibrium such as reaction 8.163 and assuming unitary activity for the condensed phases (i.e., pure metals), we have... [Pg.543]

At standard state, equation 8.211 obviously concerns standard state stable components—i.e., pure Fe metal at F = 25 °C, P = 1 bar, and a hypothetical one-molal Fe + solution referred to infinite dilution, at the same P and T conditions (cf section 8.4). The chemical potentials of components in reactions Fe2+(aqueous), ae-(aqueous)) SFC thosc of Standard State hence, by defini-tion, the activity of all components in reaction is 1—i.e.,... [Pg.551]

A piece of jewehy is marked 14 carat gold, meaning that on a mass basis the jewelry is 14/24 pure gold. What is the molality of this alloy—considering the other metal as the solvent ... [Pg.585]

Conduction of electric current in conductors can be electronic or ionic, depending on the type of charges involved. Electronic conduction is found in all metals and also in certain other nonmetals. Ionic conductors are also known as electrolytes. Substances that ordinarily are not conducting can produce ionic conduction after being dissolved in water or another solvent (e.g., electrolyte solution and weak electrolyte ). The relative amount of substance present in a solution or a mixture is known as its concentration. The different concentration units used mostly are molarity, molality, normality, and mole fraction. The acidity or basicity of a solution is measured by a relative measurement called the pH of solution. It is defined as the cologarithm of the activity of dissolved hydrogen ions (H" "). Pure water is said to be neutral. The pH for pure water at 25 °C (77 °F) is close to 7.0. Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are said to be basic or alkaline. [Pg.29]


See other pages where Molalities pure metal is mentioned: [Pg.1132]    [Pg.488]    [Pg.1165]    [Pg.137]    [Pg.155]    [Pg.707]    [Pg.236]    [Pg.56]    [Pg.24]   
See also in sourсe #XX -- [ Pg.73 ]




SEARCH



Molal

Molality

Pure metals

© 2024 chempedia.info