CHEMISTRY SAMPLE DATA SHEET Copyright © School Curriculum and Standards Authority, 2014 This document – apart from any third party copyright material contained in it – may be freely copied, or communicated on an intranet, for non-commercial purposes in educational institutions, provided that it is not changed and that the School Curriculum and Standards Authority is acknowledged as the copyright owner. Copying or communication for any other purpose can be done only within the terms of the Copyright Act or with prior written permission of the Authority. Copying or communication of any third party copyright material can be done only within the terms of the Copyright Act or with permission of the copyright owners. Chemistry Sample Data Sheet 2016 2014/10138 Table of contents Periodic table of the elements........................................................................................................ 3 Formulae........................................................................................................................................ 4 Units............................................................................................................................................... 4 Constants....................................................................................................................................... 4 Solubility rules for ionic solids in water........................................................................................... 4 Colours of selected substances..................................................................................................... 5 α-amino acids........................................................................................................................... 6 – 7 Standard reduction potentials......................................................................................................... 8 2 3 [Data source: The International Union of Pure and Applied Chemistry Periodic Table of the Elements (May 2013)] Periodic table Formulae Number of moles n = m = M Number of moles of solute n = cV Number of moles of a gas at STP n = Parts per million ppm = pH of a solution pH mass molar mass V 22.71 mass of solute (mg) mass of solution (kg) = - log [H+] Units Volumes are given in the units of litres (L), or millilitres (mL) Temperatures are given in the units of degrees Celsius (°C) or kelvin (K). It may be assumed that 0.0 °C = 273.15 K Energy changes are given in kilojoules (kJ) Pressures are given in kilopascals (kPa) Solution concentrations are given in the units moles per litre (mol L-1), grams per litre (g L-1) or parts per million (ppm). Constants Universal gas constant, R = 8.314 J K-1 mol-1 Avogadro constant, N = 6.022×1023 mol-1 Volume of 1.00 mol of an ideal gas at 0.0 °C and 100.0 kPa is 22.71 L S.T.P. is 0.0 °C and 100.0 kPa Equilibrium constant for water at 25 °C, Kw = 1.00×10–14 Solubility rules for ionic solids in water Soluble in water Exceptions Soluble Most chlorides Most bromides Most iodides Slightly soluble PbCℓ2 PbBr2 Insoluble AgCℓ AgBr AgI, PbI2 All nitrates No exceptions All ethanoates Most sulfates CaSO4, Ag2SO4 SrSO4, BaSO4, PbSO4 Insoluble in water Insoluble Exceptions Soluble Slightly soluble Most hydroxides NaOH, KOH, Ba(OH)2 NH4OH*, AgOH** Ca(OH)2, Sr(OH)2 Most carbonates Na2CO3, K2CO3, (NH4)2CO3 Most phosphates Na3PO4, K3PO4, (NH4)3PO4 Most sulfides Na2S, K2S, (NH4)2S * ** NH3 dissolves in water to form both NH3 (aq) and NH4+(aq)/OH–(aq) Ag+(aq) reacts with OH–(aq) to form insoluble Ag2O Soluble = more than 0.1 mole dissolves per litre Slightly soluble = between 0.01 and 0.1 mole dissolves per litre Insoluble = less than 0.01 mole dissolves per litre 4 Colours of selected substances In general, ionic solids have the same colour as that of any coloured ion they contain. Two colourless ions in general produce a white solid. Selected exceptions to these two basic rules are noted below. Ionic Solid Colour Other coloured substances copper(II) carbonate green copper(II) chloride green copper(II) oxide black Most gases and liquids are colourless, and most metals are silvery or grey. Selected exceptions to these basic rules are noted below. copper(II) sulfide black lead(II) iodide yellow lead(II) sulfide grey manganese(IV) oxide black silver carbonate yellow silver iodide pale yellow silver oxide brown silver sulfide black Substance State Colour copper solid salmon pink gold solid yellow nitrogen dioxide gas brown sulfur solid yellow Coloured halogens Halogen Colour of free element F2(g) yellow Cℓ2(g) greenish-yellow Br2(ℓ) red I2(s) purple Halogen Colour of halogen in aqueous solution Cℓ2(aq) pale yellow Br2(aq) orange I2(aq) brown Halogen Colour of halogen in organic solvent Br2 red I2 purple Coloured ions in aqueous solution Cation 2+ Co pink Cu2+ blue Fe 2+ pale green Fe 3+ pale brown Mn pale pink 2+ Ni2+ green Anion Colour CrO42– yellow Cr2O7 orange 2– MnO4 5 Colour deep green Cr 3+ – purple α–amino acids Name Symbol alanine Ala Structure CH3 H 2N arginine COOH Arg NH H 2N asparagine CH CH2 CH2 CH COOH CH2 NH Asn O CH2 H 2N aspartic acid Asp Cys COOH CH COOH CH2 SH CH COOH Gln O CH2 H2 N glutamic acid H 2N Gly histidine His CH2 CH Glu glycine NH2 COOH CH2 H 2N glutamine C CH H2N cysteine C CH2 CH2 CH COOH H 2N NH2 COOH CH2 COOH COOH N CH2 H 2N isoleucine C Ile CH N H COOH CH3 CH CH2 H2N CH COOH 6 CH3 NH2 α–amino acids Name Symbol leucine Leu Structure CH3 CH CH3 CH2 H 2N lysine Lys H2N methionine CH2 CH2 CH COOH Met H2N phenylalanine CH CH2 CH COOH serine Ser threonine tryptophan CH2 S CH3 CH2 H2N Pro CH2 CH2 Phe proline COOH CH H N CH2 Thr COOH COOH OH H2N CH COOH CH3 CH OH H 2N CH COOH H N Trp CH2 H 2N tyrosine Tyr COOH CH2 H2 N valine CH Val 7 CH OH COOH CH3 CH CH3 H 2N CH COOH NH2 Standard Reduction Potentials at 25 °C Half-reaction F2(g) + 2 e H2O2(aq) + 2 H (aq) + 2 e + PbO2(s) + SO4 (aq) + 4 H (aq) + 2 e 2– + 2 F (aq) + 2.89 – 2 H2O(ℓ) + 1.76 – 2 HCℓO(aq) + 2 H+(aq) + 2 e– MnO4–(aq) + 8 H+(aq) + 5 e– Au3+(aq) + 3 e– HCℓO(aq) + H (aq) + 2 e – PbO2(s) + 4 H (aq) + 2 e – + + Cℓ2(g) + 2 e Cr2O7 (aq) + 14 H (aq) + 6 e 2– + O2(g) + 4 H (aq) + 4 e + E°(volts) – – PbSO4(s) + 2 H2O(ℓ) + 1.69 Cℓ2(g) + 2 H2O(ℓ) + 1.63 Mn2+(aq) + 4 H2O(ℓ) + 1.51 Au(s) + 1.50 Cℓ (aq) + H2O(ℓ) + 1.49 – Pb (aq) + 2 H2O(ℓ) 2+ + 1.46 – 2 Cℓ (aq) – 2 Cr (aq) + 7 H2O(ℓ) + 1.36 – + 1.36 – 3+ 2 H2O(ℓ) + 1.23 – – 2 Br (aq) + 1.08 Ag (aq) + e – Ag(s) + 0.80 Fe (aq) + e – Fe (aq) + 0.77 O2(g) + 2 H (aq) + 2 e – H2O2(aq) + 0.70 Br2(ℓ) + 2 e + 3+ + I2(s) + 2 e 2+ 2 I (aq) + 0.54 – 4 OH (aq) + 0.40 Cu (aq) + 2 e – Cu(s) + 0.34 S(s)+ 2 H (aq) + 2 e – + 0.17 2 H (aq) + 2 e H2S(aq) – Pb (aq) + 2 e – Pb(s) – 0.13 Sn (aq) + 2 e – Sn(s) – 0.14 Ni (aq) + 2 e – Ni(s) – 0.24 Co (aq) + 2 e – Co(s) – O2(g) + 2 H2O(ℓ) + 4 e 2+ + + 2+ 2+ 2+ 2+ PbSO4(s) + 2 e – – – H2(g) 0 exactly – 0.28 Pb(s) + SO4 (aq) 2– – 0.36 Cd (aq) + 2 e – Cd(s) – 0.40 2 CO2(g) + 2 H (aq) + 2 e – – 0.43 Fe2+(aq) + 2 e– H2C2O4(aq) Fe(s) – 0.44 Cr (aq) + 3 e – Cr(s) – 0.74 Zn (aq) + 2 e – Zn(s) 2+ + 3+ 2+ 2 H2O(ℓ) + 2 e – Mn 2+(aq) + 2 e– – 0.76 H2(g) + 2 OH (aq) – – 0.83 Mn(s) – 1.18 Aℓ (aq) + 3 e – Aℓ(s) – 1.68 Mg (aq) + 2 e – Mg(s) – 2.36 Na (aq) + e – Na(s) – 2.71 Ca2+(aq) + 2 e– Ca(s) – 2.87 Sr (aq) + 2 e – Sr(s) – 2.90 Ba (aq) + 2 e – Ba(s) – 2.91 K (aq) + e – K(s) – 2.94 3+ 2+ + 2+ 2+ + [Data source: Aylward, G.H., & Findlay, T. (2008). SI Chemical Data (6th ed.). Queensland: John Wiley & Sons Australia, Ltd.] 8
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