ACIDS AND BASES
Chemistry Review: Section 1.6 pg. 34-36 Review of Acids
• Empirically, acids are (aq) molecular compounds of hydrogen that form electrically conduc ve solu ons and turn blue litmus paper red. Remember: R BLUE E A ACID S E • By conven on, the formula for an empirically iden fied acid is wri en as: H___ (aq) or ____COOH(aq)
Example: HCl(aq) and H2SO4(aq) are acids CH4(g) and NH3(g) are not acids, so hydrogen is wri en last *In some cases, hydrogen is wri en last if part of a –COOH group
ex. CH3COOH(aq) – these are organic acids Review of Bases
• Empirically, bases are (aq) ionic hydroxides that form electrically conduc ve solu ons and turn red litmus paper blue.
• By conven on, you are looking for a ionic (metal) hydroxides (OH‐)
NaOH(aq) Ba(OH)2(aq) , KOH(aq)
•There is no special nomenclature system for bases. ‐They are names as ionic hydroxides Ex. KOH(aq) = potassium hydroxide NH4OH(aq) = ammonium hydroxide Acids vs. Bases
Proper es of an Acid Proper es of a Base • Tastes sour, always in • Taste bi er and have a solu on (aq) slippery feel • Turns litmus paper red • Turns litmus paper blue • Has a pH of less than 7 • Has a pH greater than 7 • Good conductor, • Good conductor, corrodes metals doesn’t react with • Lemon juice and metals vinegar are good • Most hand soaps and examples. drain cleaners are bases Naming Acids
Systema c IUPAC Tradi onal
1) aqueous hydrogen chloride 1) hydrogen ______ide = hydro______ic acid
HCl (aq) ex. hydrogen chloride = hydrochloric acid
1) aqueous hydrogen chlorate 1) hydrogen ______ate = ______ic acid
HClO3(aq) ex. hydrogen chlorate = chloric acid
1) aqueous hydrogen chlorite 1) hydrogen ______ite = ______ous acid
HClO2(aq) ex. hydrogen chlorite = chlorous acid
Remember: acid contains sulfur = you add a ur H2SO4(aq) sulfuric acid acid contains phosphorus = add an or H3PO4(aq) phorphoric acid Practice – Naming Acids
IUPAC Traditional
aqueous hydrogen perchlorate perchloric acid HClO4(aq)
hypochlorous acid HClO(aq) aqueous hydrogen hypochlorite
HNO2(aq) aqueous hydrogen nitrite nitrous acid
HNO3(aq) aqueous hydrogen nitrate nitric acid
H2SO4(aq) aqueous hydrogen sulfate sulfuric acid
H2SO3(aq) aqueous hydrogen sulfite sulfurous acid
H3PO4(aq) aqueous hydrogen phosphate phosphoric acid