Presentation on theme: "Oxy-Acids You will need to know these common oxy-acids (with a 100% confidence level!) nitric acid HNO3 chloric acid HClO3 carbonic acid H2CO3 sulphuric."— Presentation transcript:
1Oxy-AcidsYou will need to know these common oxy-acids (with a 100% confidence level!)nitric acid HNO3chloric acid HClO3carbonic acid H2CO3sulphuric acid H2SO4phosphoric acid H3PO4
2Memory Aid - Acids The following expression gives you a memory aid that may help working out theformula for the various oxy-acids.Nick the Camel had a Clam for Supper in PhoenixFirst letter(s) identify the acid# vowels = # H’s# consonants = # O’s
3Memory Aid - Acids Nick the Camel had a Clam for Supper in Phoenix First letter(s) identify the acid# vowels = # H’s# consonants = # O’sNick N, nitrogen, nitric1 vowel, 3 consonantsHNO3
4Oxy-Acid Formulae Nick the Camel had a Clam for Supper in Phoenix What is the formula for:chloric acid?HClO3phosphoric acid?H3PO4
5Oxy-Acid RadicalsNew negative ions/radicals are produced when you remove the hydrogens from each oxy-acid.Each of these new ions/radicals are treated as a group/unit. The valence of the ion/radical corresponds to the number of hydrogens removed.
6Oxy-Acid Radicals Consider sulphuric acid: H2SO4 Removing the 2 H’s gives the ion/radical:SO42- this ion/radical is called sulphate;its valence is 2
7Oxy-Acid RadicalsYou do not need to memorize all of these - you will be provided with a list for quizzes/tests/exam.The negative ions/radicals related to the oxy-acids can now be used to form compounds.
8Compounds with Oxy-Acid Ions/Radicals Write the formula for aluminum nitrate:Valence of aluminum is 3Val. of nitrate is 1 (nitrate: NO3- from HNO3)Keep in mind that the nitrate ion is a group.Use our cross-over technique to show 3 nitrate groups:Al(NO3)3(You read this as “AlNO3 taken 3 times”)
10And Still More Examples Mg(ClO3)2 magnesium chlorateZnCO3 zinc carbonateLiNO3 lithium nitrateY2(SO4)3 yttrium sulphateCo3(PO4)2 cobalt(II) phosphate ** NOTE: When multiple valences are involved, you do not use the prefix system with radicals.
11Special Ions/Radicals . You will also have to be able to give names/write formulae using these special ions/radicals (also on the list provided).NH4+ - ammonium ionOH- - hydroxide ionHCO3- - bicarbonate ion(also called hydrogen carbonate)Each has a val. of 1 ; each is a group/unit.
12Examples using Special Ions/Radicals ammonium oxide (NH4)2Ozinc hydroxide Zn(OH)2iron(III) bicarbonate Fe(HCO3)3NH4ClO3 ammonium chlorateLiOH lithium hydroxide
13More Examples with Special Ions/Radicals ammonium chloride NH4Cltin(IV) bicarbonate Sn(HCO3)4iron(III) hydroxide Fe(OH)3ammonium sulphate (NH4)2SO4Ba(OH)2 barium hydroxideNH4HCO3 ammonium bicarbonate
14Other Special Compounds There are several special compounds you will encounter in this course. We ask that you commit this one to memory:hydrogen peroxide H2O2