Acid Naming & Formula Writing

Acid Naming & Formula Writing

Fill in the Blank

You can recognize an acid because the formula always

Multiple Select

Mark all of the acids in the list

• HCl

• NaOH

• HNO₃

• hydrosulfuric acid

• nitrogen trihydride

Categories of Acids

• Acids may all start the same, but there are 2 types based on what they contain

• Binary acids contain a single nonmetal anion

• Oxyacids contain a polyatomic anion which has oxygen in the formula

• How are they named differently?

Multiple Select

Mark all of the binary acids in the following list

• HBr

• NaBr

• HBrO₂

• H₂S

• sulfuric acid

Naming Binary Acids

• There are not many of these!

• Most important thing is to start ONLY these acids with "hydro"

• There is ONE WEIRD EXCEPTION! The polyatomic ion cyanide (CN^1-) is named by binary rules because it doesn't have oxygen

• HCN = cyanide --> cyanic so hydrocyanic acid

Multiple Choice

What is the correct name of HF?

• fluoric acid

• hydrofluoric acid

• hydrofluorine

• hydrogen monofluoride

Writing Formulas for Binary Acids

• Ending in "acid" means you start with H in the formula

• "hydro" means you only have 1 other nonmetal

• Use the "root" in the name to identify the other nonmetal and it's charge

• The charge tells you how many hydrogens you need in the formula (there will only ever be 1 of the other thing in the formula)

Multiple Choice

What is the correct formula for hydrophosphoric acid?

• HP

• H₂P

• H₃P

• HP₂

• HP₃

Naming Oxyacids

• You have to determine the polyatomic ion in the formula in order to name these. Everything is based off of that.

• Literally write the name of the polyatomic ion.

• If it ends in "ate", drop that and add "ic acid".

• If it ends in "ite", drop that and add "ous acid".

Multiple Choice

What is the correct name of HClO₃?

• hydrochloric acid

• chloric acid

• chlorous acid

• hydrogen chlorine trioxide

Writing Formulas for Oxyacids

• Ending in "acid" means you start with H in the formula

• NO "hydro" means you have a polyatomic

• Use the "root" in the name and "ic" or "ous" to identify the polyatomic and it's charge

• The charge tells you how many hydrogens you need in the formula (there will only ever be 1 of the other thing in the formula)

Multiple Choice

What is the correct formula for phosphoric acid?

• H₃P

• HPO₄

• H₃PO₄

• H₃PO₃

• HPO₄^2-

Poll

You clearly need to know your polyatomic ions and have the cheat handy for your homework. Mark all that apply for you.

• I have printed out that cheatsheet from the notes last week!

• I handwrote out the list of polyatomics from the jam board/notes video

• I have made physical flashcards of the highlighted polyatomic ions

• I have made/found a Quizlet set of the highlighted polyatomic ions

• I have done none of these things