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use with textbook pages 207 - 211. 1 - 5 word equations write the skele…

Question

use with textbook pages 207 - 211. 1 - 5
word equations
write the skeleton equation for each of the following reactions. then balance each of the following chemical equations.

  1. hydrogen + oxygen → water
  2. iron(iii) oxide + hydrogen → water + iron
  3. sodium + water → sodium hydroxide + hydrogen
  4. calcium carbide + oxygen → calcium + carbon dioxide
  5. potassium iodide + chlorine → potassium chloride + iodine
  6. chromium + tin(iv) chloride → chromium(iii) chloride + tin
  7. magnesium + copper(ii) sulphate → magnesium sulphate + copper
  8. zinc sulphate + strontium chloride → zinc chloride + strontium sulphate
  9. ammonium chloride + lead(iii) nitrate → ammonium nitrate + lead(iii) chloride
  10. iron(iii) nitrate + magnesium sulphide → iron(iii) sulphide + magnesium nitrate
  11. aluminum chloride + sodium carbonate → aluminum carbonate + sodium chloride
  12. sodium phosphate + calcium hydroxide → sodium hydroxide + calcium phosphate

Explanation:

Step1: Write chemical formulas

  • Hydrogen: \(H_2\), oxygen: \(O_2\), water: \(H_2O\).
  • Iron(III) oxide: \(Fe_2O_3\), hydrogen: \(H_2\), water: \(H_2O\), iron: \(Fe\).
  • Sodium: \(Na\), water: \(H_2O\), sodium hydroxide: \(NaOH\), hydrogen: \(H_2\).
  • Calcium carbide: \(CaC_2\), oxygen: \(O_2\), calcium: \(Ca\), carbon dioxide: \(CO_2\).
  • Potassium iodide: \(KI\), chlorine: \(Cl_2\), potassium chloride: \(KCl\), iodine: \(I_2\).
  • Chromium: \(Cr\), tin(IV) chloride: \(SnCl_4\), chromium(III) chloride: \(CrCl_3\), tin: \(Sn\).
  • Magnesium: \(Mg\), copper(II) sulphate: \(CuSO_4\), magnesium sulphate: \(MgSO_4\), copper: \(Cu\).
  • Zinc sulphate: \(ZnSO_4\), strontium chloride: \(SrCl_2\), zinc chloride: \(ZnCl_2\), strontium sulphate: \(SrSO_4\).
  • Ammonium chloride: \(NH_4Cl\), lead(III) nitrate: \(Pb(NO_3)_3\), ammonium nitrate: \(NH_4NO_3\), lead(III) chloride: \(PbCl_3\).
  • Iron(III) nitrate: \(Fe(NO_3)_3\), magnesium sulphide: \(MgS\), iron(III) sulphide: \(Fe_2S_3\), magnesium nitrate: \(Mg(NO_3)_2\).
  • Aluminum chloride: \(AlCl_3\), sodium carbonate: \(Na_2CO_3\), aluminum carbonate: \(Al_2(CO_3)_3\), sodium chloride: \(NaCl\).
  • Sodium phosphate: \(Na_3PO_4\), calcium hydroxide: \(Ca(OH)_2\), sodium hydroxide: \(NaOH\), calcium phosphate: \(Ca_3(PO_4)_2\).

Step2: Write skeleton equations

  1. \(H_2+O_2

ightarrow H_2O\)

  1. \(Fe_2O_3 + H_2

ightarrow H_2O+Fe\)

  1. \(Na + H_2O

ightarrow NaOH+H_2\)

  1. \(CaC_2+O_2

ightarrow Ca+CO_2\)

  1. \(KI+Cl_2

ightarrow KCl+I_2\)

  1. \(Cr+SnCl_4

ightarrow CrCl_3+Sn\)

  1. \(Mg+CuSO_4

ightarrow MgSO_4+Cu\)

  1. \(ZnSO_4+SrCl_2

ightarrow ZnCl_2+SrSO_4\)

  1. \(NH_4Cl+Pb(NO_3)_3

ightarrow NH_4NO_3+PbCl_3\)

  1. \(Fe(NO_3)_3+MgS

ightarrow Fe_2S_3+Mg(NO_3)_2\)

  1. \(AlCl_3+Na_2CO_3

ightarrow Al_2(CO_3)_3+NaCl\)

  1. \(Na_3PO_4+Ca(OH)_2

ightarrow NaOH+Ca_3(PO_4)_2\)

Step3: Balance equations

  1. \(2H_2+O_2 = 2H_2O\)
  2. \(Fe_2O_3 + 3H_2=3H_2O+2Fe\)
  3. \(2Na + 2H_2O=2NaOH+H_2\)
  4. \(CaC_2+2O_2 = Ca+2CO_2\)
  5. \(2KI+Cl_2 = 2KCl+I_2\)
  6. \(4Cr+3SnCl_4 = 4CrCl_3+3Sn\)
  7. \(Mg+CuSO_4 = MgSO_4+Cu\) (already balanced)
  8. \(ZnSO_4+SrCl_2 = ZnCl_2+SrSO_4\) (already balanced)
  9. \(3NH_4Cl+Pb(NO_3)_3 = 3NH_4NO_3+PbCl_3\)
  10. \(2Fe(NO_3)_3+3MgS = Fe_2S_3+3Mg(NO_3)_2\)
  11. \(2AlCl_3+3Na_2CO_3 = Al_2(CO_3)_3+6NaCl\)
  12. \(2Na_3PO_4+3Ca(OH)_2 = 6NaOH+Ca_3(PO_4)_2\)

Answer:

  1. Skeleton: \(H_2+O_2

ightarrow H_2O\); Balanced: \(2H_2+O_2 = 2H_2O\)

  1. Skeleton: \(Fe_2O_3 + H_2

ightarrow H_2O+Fe\); Balanced: \(Fe_2O_3 + 3H_2=3H_2O+2Fe\)

  1. Skeleton: \(Na + H_2O

ightarrow NaOH+H_2\); Balanced: \(2Na + 2H_2O=2NaOH+H_2\)

  1. Skeleton: \(CaC_2+O_2

ightarrow Ca+CO_2\); Balanced: \(CaC_2+2O_2 = Ca+2CO_2\)

  1. Skeleton: \(KI+Cl_2

ightarrow KCl+I_2\); Balanced: \(2KI+Cl_2 = 2KCl+I_2\)

  1. Skeleton: \(Cr+SnCl_4

ightarrow CrCl_3+Sn\); Balanced: \(4Cr+3SnCl_4 = 4CrCl_3+3Sn\)

  1. Skeleton: \(Mg+CuSO_4

ightarrow MgSO_4+Cu\); Balanced: \(Mg+CuSO_4 = MgSO_4+Cu\)

  1. Skeleton: \(ZnSO_4+SrCl_2

ightarrow ZnCl_2+SrSO_4\); Balanced: \(ZnSO_4+SrCl_2 = ZnCl_2+SrSO_4\)

  1. Skeleton: \(NH_4Cl+Pb(NO_3)_3

ightarrow NH_4NO_3+PbCl_3\); Balanced: \(3NH_4Cl+Pb(NO_3)_3 = 3NH_4NO_3+PbCl_3\)

  1. Skeleton: \(Fe(NO_3)_3+MgS

ightarrow Fe_2S_3+Mg(NO_3)_2\); Balanced: \(2Fe(NO_3)_3+3MgS = Fe_2S_3+3Mg(NO_3)_2\)

  1. Skeleton: \(AlCl_3+Na_2CO_3

ightarrow Al_2(CO_3)_3+NaCl\); Balanced: \(2AlCl_3+3Na_2CO_3 = Al_2(CO_3)_3+6NaCl\)

  1. Skeleton: \(Na_3PO_4+Ca(OH)_2

ightarrow NaOH+Ca_3(PO_4)_2\); Balanced: \(2Na_3PO_4+3Ca(OH)_2 = 6NaOH+Ca_3(PO_4)_2\)