Potassium
By: Hayden Kerr 4th Block
Information
Discovery: 1808 and was discovered by Sir Humphry Davy
3 properties: Chemical: reacts violently with water and gives off hydrogen gas, Physical: Melting point 63 C, and Density: 0.89
Uses: Fertilizers, salt substitute, and to produce other chemicals.
3 compounds: Potassium chloride (fertilizer), Potassium hydroxide (soap/detergents), and Potassium carbonate (KHCO3)
Model's
Number of Valence electrons: 8
Periodic Table
- Atomic number/mass: 19 and 39.098
- Neutrons: 20 Protons: 19 Electrons: 19
- Nuclide: 39K, 40K
- Hyphen: K-39,
Group
- All have one valence electrons
- Low melting points and boiling points
- Very soft, you can cut it with a knife
- Low densities
- React quickly with water
Reaction Type
Reaction Type: Synthesis
Equation: K + H2O --> H2 + 2KOH
Mole Ratio: 1 mol of K and 1 mol of H2O makes 2 KOH
Potassium in Water (reaction only)
Bonding
2 K (s) + 2 H2O (l) → 2 KOH (aq) + H2(g): Potassium Hydroxide
Its an ionic bond
K: 51% H2O: 49%
Citations
- Website Title It's Elemental Article Title: The Element Potassium http://education.jlab.org/itselemental/ele019.html
- Website Title: Potassium- Istope data https://www.webelements.com/potassium/isotopes.html
- Website Title: health.com Article title: 15 foods high in potassium http://www.health.com/health/gallery/0,,20721159,00.html