A report on ElectrolysisLithium and Potassium

Illustration of a Hofmann electrolysis apparatus used in a school laboratory
Atomic structure of Lithium-7
The flame test of potassium.
Hall-Heroult process for producing aluminium
Lithium ingots with a thin layer of black nitride tarnish
Structure of solid potassium superoxide.
Lithium floating in oil
Potassium in feldspar
Lithium is about as common as chlorine in the Earth's upper continental crust, on a per-atom basis.
Sir Humphry Davy
Nova Centauri 2013 is the first in which evidence of lithium has been found.
Pieces of potassium metal
Johan August Arfwedson is credited with the discovery of lithium in 1817
Sylvite from New Mexico
Hexameric structure of the n-butyllithium fragment in a crystal
Monte Kali, a potash mining and beneficiation waste heap in Hesse, Germany, consisting mostly of sodium chloride.
Scatter plots of lithium grade and tonnage for selected world deposits, as of 2017
Potassium sulfate/magnesium sulfate fertilizer
Lithium use in flares and pyrotechnics is due to its rose-red flame.
The launch of a torpedo using lithium as fuel
Lithium deuteride was used as fuel in the Castle Bravo nuclear device.
Estimates of global lithium uses in 2011 (picture) and 2019 (numbers below) 
Ceramics and glass (18%)
Batteries (65%)
Lubricating greases (5%)
Continuous casting (3%)
Air treatment (1%)
Polymers
Primary aluminum production
Pharmaceuticals
Other (5%)

Lithium metal is isolated electrolytically from a mixture of lithium chloride and potassium chloride.

- Lithium

It was suspected in 1702 that they were distinct elements that combine with the same anions to make similar salts, and this was proven in 1807 through using electrolysis.

- Potassium

Like the other alkali metals (which are sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr)), lithium has a single valence electron that is easily given up to form a cation.

- Lithium

Potassium is the second least dense metal after lithium.

- Potassium

1808 – Potassium (1807), sodium (1807), barium, calcium and magnesium were discovered by Humphry Davy using electrolysis.

- Electrolysis

1821 – Lithium was discovered by the English chemist William Thomas Brande, who obtained it by electrolysis of lithium oxide.

- Electrolysis
Illustration of a Hofmann electrolysis apparatus used in a school laboratory

1 related topic with Alpha

Overall

Emission spectrum for sodium, showing the D line.

Sodium

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Chemical element with the symbol Na and atomic number 11.

Chemical element with the symbol Na and atomic number 11.

Emission spectrum for sodium, showing the D line.
A positive flame test for sodium has a bright yellow color.
The structure of sodium chloride, showing octahedral coordination around Na+ and Cl− centres. This framework disintegrates when dissolved in water and reassembles when the water evaporates.
Two equivalent images of the chemical structure of sodium stearate, a typical soap.
The structure of the complex of sodium (Na+, shown in yellow) and the antibiotic monensin-A.
NaK phase diagram, showing the melting point of sodium as a function of potassium concentration. NaK with 77% potassium is eutectic and has the lowest melting point of the NaK alloys at −12.6 °C.

Sodium was first isolated by Humphry Davy in 1807 by the electrolysis of sodium hydroxide.

By means of the sodium-potassium pump, living human cells pump three sodium ions out of the cell in exchange for two potassium ions pumped in; comparing ion concentrations across the cell membrane, inside to outside, potassium measures about 40:1, and sodium, about 1:10.

Metallic sodium is generally less reactive than potassium and more reactive than lithium.