Chemical Analysis 0.0 / 5 ? ChemistryChemical AnalysisGCSEAQA Created by: zawarudioCreated on: 18-05-22 18:44 What is an atom? The smallest particle of an element to exist 1 of 26 What is an element? Made up of one type of atom 2 of 26 What is a Compound? Made up of 2/more different types of atoms that are chemically bonded 3 of 26 What is a Molecule? - Compound - Covalently Bonded 4 of 26 What is a Mixture? - made up of 2/more different substances -not chemically bonded 5 of 26 What is a Pure Substance? Contains only 1 type of substance 6 of 26 What is an Ion? -atom -lost/gain electrons 7 of 26 What is the test for Carbon dioxide Chemical test: Bubble Gas through limewater Positive result: Limewater goes cloudy 8 of 26 What is the test for H2 Chemical test: Place lighted splint at the mouth of the test tube Positive result: Squeaky Pop 9 of 26 What is the test for O2 Chemical test: Hold glowing splint at the mouth of test tube Positive result: Glowing splint relights 10 of 26 What is the test for Cl2 Chemical test: Damp blue litmus paper in solution or in fumes Positive result: Damp blue paper is bleached white. 11 of 26 What is the test for Li Chemical test: Flame test Positive result: Crimson 12 of 26 What is the test for Na Chemical test: Flame test Positive result: Yellow 13 of 26 What is the test for K Chemical test: Flame test Positive result: Lilac 14 of 26 What is the test for Ca Chemical test: Flame test Positive result: Orange red Brick red 15 of 26 What is the test for Cu2+ Chemical test: Flame test Positive result: Green 16 of 26 What is the test for Al Chemical test: 1. Flame test 2. Add NaOH Al3+(aq) + 3OH-(aq) —> Al(OH)3(s) Positive result: 1. White bright 2. White precipitate that dissolves in excess NaOH 17 of 26 What is the test for Cu2+ Chemical test: 1. Flame test 2. Add NaOH Cu2+(aq) + 2OH-(aq) —> Cu(OH)2(s) Positive result: 1. Green 2. Blue precipitate 18 of 26 What is the test for Fe2+ Chemical test: Add NaOH Fe2+(aq) + 2OH-(aq) —> Fe(OH)2(s) Positive result: Green precipitate 19 of 26 What is the test for Fe3+ Chemical test: Add NaOH Fe3+(aq) + 3OH-(aq) —> Fe(OH)3(s) Positive result: Orange/brown precipitate 20 of 26 What is the test for Cl Chemical test: o Add nitric acid (to remove impurities) o Add silver nitrate Positive result: White precipitate (AgCl) Ag+(aq) + Cl-(aq) —> AgCl(s) 21 of 26 What is the test for Br Chemical test: o Add nitric acid (to remove impurities) o Add silver nitrate Positive result: Cream precipitate (AgBr) Ag+(aq) + Br-(aq) —> AgBr(s) 22 of 26 What is the test for I Chemical test: o Add nitric acid (to remove impurities) o Add silver nitrate Positive result: Yellow precipitate (AgI) Ag+(aq) + I-(aq) —> AgI(s) 23 of 26 What is the test for SO4 Chemical test: Add HCl followed by BaCl2 (Barium chloride) Positive result: White precipitate (BaSO4) Ba2+(aq) + SO42-(aq) —> BaSO4(s) 24 of 26 What is the test for CO3 Chemical test: Add acid and bubble gas produced through lime water. CO32- (aq) + 2H+ (aq) —> CO2(g) + H2O(l) Positive result: A gas is produced that turns Limewater turns cloudy 25 of 26 What is the test for pure substance Chemical test: -measure the substance’s boiling point Positive result: -if it is sharp -is the data book value 26 of 26
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