Data Sheet for Chemistry Examination: Atomic Weights, Formulae, and Standard Potentials, Exercises of Chemistry

Download Data Sheet for Chemistry Examination: Atomic Weights, Formulae, and Standard Potentials and more Exercises Chemistry in PDF only on Docsity! – 1 – DATA SHEET Avogadro constant, NA .................................................................. 6.022 × 1023 mol–1 Volume of 1 mole ideal gas: at 100 kPa and at 0°C (273.15 K) ...................... 22.71 L at 25°C (298.15 K) .................... 24.79 L Ionisation constant for water at 25°C (298.15 K), Kw ................. 1.0 × 10–14 Specific heat capacity of water ..................................................... 4.18 × 103 J kg–1 K–1 Some useful formulae pH = –log10[H+] ∆H = –m C ∆T Some standard potentials HIGHER SCHOOL CERTIFICATE EXAMINATION Chemistry Aylward and Findlay, SI Chemical Data (5th Edition) is the principal source of data for this examination paper. Some data may have been modified for examination purposes. K+ + e– K(s) –2.94 V Ba2+ + 2e– Ba(s) –2.91 V Ca2+ + 2e– Ca(s) –2.87 V Na+ + e– Na(s) –2.71 V Mg2+ + 2e– Mg(s) –2.36 V Al3+ + 3e– Al(s) –1.68 V Mn2+ + 2e– Mn(s) –1.18 V H2O + e– 1–2 H2(g) + OH– –0.83 V Zn2+ + 2e– Zn(s) –0.76 V Fe2+ + 2e– Fe(s) –0.44 V Ni2+ + 2e– Ni(s) –0.24 V Sn2+ + 2e– Sn(s) –0.14 V Pb2+ + 2e– Pb(s) –0.13 V H+ + e– 1–2 H2(g) 0.00 V SO4 2– + 4H+ + 2e– SO2(aq) + 2H2O 0.16 V Cu2+ + 2e– Cu(s) 0.34 V 1–2 O2(g) + H2O + 2e– 2OH– 0.40 V Cu+ + e– Cu(s) 0.52 V 1–2 I2(s) + e– I– 0.54 V 1–2 I2(aq) + e– I– 0.62 V Fe3+ + e– Fe2+ 0.77 V Ag+ + e– Ag(s) 0.80 V 1–2 Br2(l) + e– Br– 1.08 V 1–2 Br2(aq) + e– Br– 1.10 V 1–2 O2(g) + 2H+ + 2e– H2O 1.23 V 1–2 Cl2(g) + e– Cl– 1.36 V 1–2 Cr2O7 2– + 7H+ + 3e– Cr3+ + 7–2 H2O 1.36 V 1–2 Cl2(aq) + e– Cl– 1.40 V MnO4 – + 8H+ + 5e– Mn2+ + 4H2O 1.51 V 1–2 F2(g) + e– F– 2.89 V