3 Acids – Arrhenius Definition Produce Hydronium ion (H3O+1) in waterHydronium ion is water + a hydrogen cationHOwaterHO+1H+1By this definition, if an acid is to give a H+1 to water, then all acids will have hydrogen as the cation (first element written).
4 How do Acids produce Hydronium? -wateracidHydrogen cation with some anion
8 Naming non-oxygen Acids These compounds have:Start with “H” (more than 1 “H” is OK, too).Do not contain oxygenTo name these compounds:Use “hydro____ic acid”Fill in the blank with the anion’s name without the last syllable
10 HBr Example #1 Hydrobromic acid Hydrogen cation Bromine It’s an acid No oxygenUse “hydro___ic”
11 Naming Oxygen Acids These compounds have: To name these compounds: Start with “H” (more than 1 “H” is OK, too).Do contain oxygenTo name these compounds:Use “___ic acids” for “-ate” anionsUse “___ous acids” for “-ite” anionsDo not use “hydro” with these…the word “acid” is how you know it begins with hydrogen, not “hydro-”
21 Does not contain oxygen Example #4H+1Hydrogen cationHydrofluoric acidDoes not contain oxygenF-1
22 Does not contain oxygen Example #4H+1Hydrogen cationHydrofluoric acidDoes not contain oxygenH+1F-1F-1= 0HFThe compound is neutral.Subscripts are not needed
23 NON “Hydro-” acids To write these formulas: The cation is H+1 If it is an “-ic” acid, the anion is the “-ate” polyatomic ionIf it is an “-ous” acid, the anion is the “-ite” polyatomic ionAdd subscript to the hydrogen cation to balance charges
38 Write the formula or name for each Let’s PracticeCa(OH)2KOHSr(OH)2Copper (II) hydroxideMagnesium hydroxideExample:Write the formula or name for each
39 Write the formula or name for each Let’s PracticeCa(OH)2KOHSr(OH)2Copper (II) hydroxideMagnesium hydroxideCalcium hydroxidePotassium hydroxideStrontium hydroxideCu(OH)2Mg(OH)2Example:Write the formula or name for each
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