What affects ionic mobility?
The mobility of ion is affected by the following factors: 1) viscosity of solution, the greater it is, the smaller will be the mobility of ion, 2) hydration of ion - the greater is hydration, the smaller becomes mobility, because the ion has to carry molecules of water with it when it is moving.
How do you find the ion mobility?
(1) The mobility of ions or electrons in a gas or a low-temperature plasma is the ratio of the mean velocity u of the directed motion of the electrons or ions (directed as a result of the action of an electric field) to the electric field strength E: μ = u/E.
What is ionic mobility in aqueous solution?
The correct order of mobility of alkali metal ions in aqueous solution is. Solution : Smaller is size of hydrated ion, more is ionic mobility size : Li+(aq.) Na+ > K+ > Rb.
Why are salts hydrated?
Salts that have a loose enough crystalline structure to incorporate water molecules and become hydrated salts may absorb the water molecules from the water vapor in the air, or become hydrated when in contact with liquid water.
Which halide exists as a hydrated salt?
LiCl or lithium chloride is formed hydrated salt.
What happens when alkali metals react with liquid ammonia?
Alkali metals dissolve in liquid ammonia to give deep blue solutions that are conducting in nature. This happens because the alkali metal atom readily loses the valence electron in ammonia solution. Both the cation and the electron combine with ammonia to form ammoniated cation and ammoniated electron.
Which is the S block element is liquid?
Note – Li is the most powerful while Na is the least powerful reducing agent among alkali metals. All alkali metals can be dissolved in liquid ammonia....The S-Block Elements.
|Elements of the First Group||Symbol||Li|
|Ionization Enthalpy||Decreases on moving from top to bottom in the group|
How alkali metals form ionic compounds?
Alkali metals tend to lose one electron and form ions with a single positive charge. They form ionic compounds (salts) in reaction with the halogens (alkali halides). Sodium and potassium ions form important constituents of body fluids (electrolytes).
How do you extract alkali metals?
The alkali metals are among the most potent reductants known; most can be isolated by electrolysis of their molten salts or, in the case of rubidium and cesium, by reacting their hydroxide salts with a reductant. They can also be recovered from their silicate ores using a multistep process.
Do alkali metals conduct electricity?
The alkali metals, found in group 1 of the periodic table, are highly reactive metals that do not occur freely in nature. ... As with all metals, the alkali metals are malleable, ductile, and are good conductors of heat and electricity.
Why are alkali metals difficult to be reduced?
Ans: Alkali metals are highly electropositive in nature, these metals readily donate electrons to get stability. These metals does not accept electrons (as taking of electrons does not give stability), therefore it is difficult to reduce alkali metals.
Which is the strongest reducing agent among alkali metals?
Why can alkali metals Cannot be extracted by chemical reduction method?
Answer. Alkali and alkaline earth metals cannot be obtained by chemical reduction methods because they are very strong reducing agent and highly reactive metals. Because of this they can not be reduced by any other substance very easily.
Which is responsible for the Blue Colour of alkali metals in liquid ammonia?
The solvated electron is responsible for a great deal of radiation chemistry. Alkali metals dissolve in liquid ammonia giving deep blue solutions, which conduct electricity. The blue colour of the solution is due to ammoniated electrons, which absorb energy in the visible region of light.
Why are alkali metals kept in kerosene?
Alkali metals are highly reactive because they have only one electron in their valence shell which can easily be lost and metal get oxidized. In presence of water, they react to form highly flammable gas Hydrogen, so they are kept in kerosene.
What color is ammonia liquid?
When sodium is dissolved in liquid ammonia a solution of deep blue Colour is obtained explain?
1 Answer. The colour of solution (deep blue) is due to the ammoniated electron which absorbs energy in the visible region.
What happens when sodium dissolves in liquid ammonia?
When sodium metal is dissolved in liquid ammonia, blue colour solution is formed. The blue colour is due to. ... When sodium metal is dissolved in liquid ammonia to form coloured solution. Dilute solutions are bright blue in colour due to the presence of solvated electrons.
When a piece of sodium is added to ammonia a deep?
When sodium is dissolved in liquid ammonia, a solution of deep blue colour is obtained. The colour of the solution is due to. Solution : All alkali metal dissolve in liquid NH3 giving highly conducting deep blue solution.
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