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This guide provides a clear understanding of acid nomenclature, focusing on binary and ternary acids. For binary acids, use the prefix "hydro" followed by the root of the anion and the suffix "ic," culminating in the word "acid." For example, HF becomes Hydrofluoric Acid. Ternary acids follow a different pattern: with "-ite" anions, change "-ite" to "-ous" (e.g., HNO2 to Nitrous Acid), and for "-ate" anions, change "-ate" to "-ic" (e.g., HNO3 to Nitric Acid). Explore the rules with practical examples.
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Binary Acids (H + element) • Use the prefix “hydro” • Use the root of the anion (chlor, fluor, etc.) • Add the suffix “ic” • Put it all together and add the word acid Let’s try it for HF • Hydro • Fluor • Ic • Hydrofluoric Acid
Ternary Acids with –ITE (H + ion-ite) • Identify the polyatomic ion • Change the suffex “ite” to “ous” • Add the word acid Let’s try it for HNO2 • The polyatomic ion is NO2 – Nitrite • Nitrite becomes Nitrous • Nitrous Acid
Ternary Acids with –ATE (H + ion-ate) • Identify the polyatomic ion • Change the suffex “ate” to “ic” • Add the word acid Let’s try it for HNO3 • The polyatomic ion is NO3 – Nitrate • Nitrate becomes Nitric • Nitric Acid
HCl Hydrochloric Acid
HClO2 Chlorous Acid
HClO3 Chloric Acid
Sulfurous Acid H2SO3
Sulfuric Acid H2SO4