Writing symbol equations:

  1. 2HCl + Na2O → 2NaCl + H2O
  2. 2HNO3 + CaCO3 → Ca(NO3)2 + CO2 + H2O
  3. H2SO4 + 2KOH → K2SO4 + 2H2O
  4. Cl2 + 2NaI → 2NaCl + I2
  5. Mg + 2HCl → MgCl2 + H2
  6. C3H8 + 5O2 → 3CO2 + 4H2O
  7. 2Na + Cl2 → 2NaCl
  8. Mg + Cu(NO3)2 → Cu + Mg(NO3)2

State symbols

  1. CaCO3 (s) + 2HCl (aq) → CaCl2 (aq) + H2O (l) + CO2 (g)
  2. MgCl2 (aq) + 2NaOH (aq) → Mg(OH)2 (s) + 2NaCl (aq)
  3. 2C4H10 (g) + 13 O2 (g) → 8CO2 (g) + 10H2O (l)
  4. CaCO3 (s) → CaO (s) + CO2 (g)

Ionic equations

  1. Ni2+ (aq) + 2OH– (aq) → Ni(OH)2 (s)
  2. 2Fe3+ (aq) + 3CO32- (aq) → Fe2(CO3)3 (s)
  3. 2H+ + CO32- → H2O + CO2
  4. H+ + OH– → H2O
  5. 2H+ + O2- → H2O
  6. Mg + 2H+ → Mg2+ + H2
  7. 2Br– + F2 → 2F– + Br2

Half equations

  1. Mg2+ + 2e– → Mg
  2. 2Cl– → Cl2 + 2e–
  3. Fe2+ → Fe3+ + e–
  4. 2O2- → O2 + 4e–
  5. Cr3+ + 3e– → Cr

Ionic compounds answers

Types of reaction answers

Chemical calculations answers

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