Is KOH Potassium hydroxide Ionic or Covalent

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To tell if KOH (Potassium hydroxide) is ionic or covalent (also called molecular) we look at the Periodic Table that and see that K is a metal and OH is a group of non-metals. Here the group of nonmetals make up a polyatomic ion. When we have a metal and a group of non-metals the compound is usually considered ionic. • Because we have a metal and non-metals in KOH there will be a difference in electronegativity between the metal and group of nonmetals. This difference results in an electron(s) being transferred from the metal (lower electronegativity) to the non-metal (higher electronegativity). The results in the metal becoming a positive ion and the group of non-metals a negative polyatomic ion. The two opposite charges are attracted and form the ionic bond between ions in Potassium hydroxide. • --- • Helpful Resources • Metals, Non-Metals on the P- Table: • Metals, Nonmetals, and Metalloids on ... • Ionic, Covalent, Polar Covalent: • Polar, Non-Polar, and Ionic Compounds... • Electronegativity for each element: https://en.wikipedia.org/wiki/Electro... • Memorizing Polyatomic Ions: • Memorizing and Using the List of Poly... • Finding Ionic Charge: • Figuring out the Charge on Ions • --- • Because we have a combination of a metal and non-metal KOH (Potassium hydroxide) is considered an ionic compound. • In general, ionic compounds: • form crystals. • have high melting points and boiling points. • are hard and brittle. • conduct electricity when dissolved in water. • as solids do not conduct electricity. • • For more chemistry help, see http://www.Breslyn.org.

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