Its in bannanas
Sir Humphry Davy first isolated metallic potassium in 1807. He extracted it from caustic potash by using electrolysis.
Alkali Metals Group
Common properties and trends:
- 1 valence electron
- Never found as a free element
- Least dense metals on the periodic table
- High electrical conductivity
- Increasing reactivity down group
- Decreasing electronegativity down group
2KClO3 → 2KCl + 3O2
Lead Nitrate Potassium Chloride
Double ReplacementPb(NO3)2 + 2KCl → 2KNO3 + PbCl2
Reaction With water
2K + 2H2O → 2KOH + H2. 2 Potassium (K) atoms react with 2 water (H2O) molecules to form 2 Potassium Hydroxide (KOH) molecules and 1 molecule of Hydrogen (H) gas, releasing energy in the process. This is an example of a single replacement reaction.
A compound containing Potassium, Potassium Chloride, is used for a variety of purposes from replenishing electrolytes to causing cardiac arrest in lethal injections.
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 "Periodic Table: Trends." Www.rsc.org. Royal Society of Chemistry, 2015.
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 Greenwood, N. N., and A. Earnshaw. Chemistry of the Elements, Second
Edition. N.p.: Butterworth-Heinemann, 1997. Wikipedia. Web. 14 Dec. 2015.
 "Reactions of Alkali Metals." BBC News. BBC, 2014. Web. 14 Dec. 2015.
 Clark, Jim. "Reactions of the Group 1 Elements with Water." Reactions of the
Group 1 Elements with Water. N.p., Feb. 2015. Web. 14 Dec. 2015.
 Garth, David. "Hypokalemia in Emergency Medicine Treatment & Management." Hypokalemia in Emergency Medicine Treatment & Management: Prehospital Care, Emergency Department Care, Consultations. Medscape, 30 Oct. 2015. Web. 14 Dec. 2015.