Question

balance the following chemical equations. each blank is worth one point.

1. _ fe + _ hcl → _ fecl₂ + _ h₂
2. _ na + _ h₂o → _ naoh + _ h₂
3. _ al + _ o₂ → ___ al₂o₃
4. _ mg + _ hno₃ → _ mg(no₃)₂ + _ h₂
5. _ zn + _ hcl → _ zncl₂ + _ h₂
6. _ h₂so₄ + _ naoh → _ na₂so₄ + _ h₂o
7. _ cacl₂ + _ na₃po₄ → _ ca₃(po₄)₂ + _ nacl
8. _ fecl₃ + _ naoh → _ fe(oh)₃ + _ nacl
9. _ bacl₂ + _ na₂so₄ → _ baso₄ + _ nacl
10. _ hno₃ + _ ca(oh)₂ → _ ca(no₃)₂ + _ h₂o
11. _ al + _ hno₃ → _ al(no₃)₃ + _ h₂

bonus: _ kmno₄ + _ hcl → _ kcl + _ mncl₂ + _ cl₂ + _ h₂o

Explanation:

Step1: Balance Fe in first equation

1 Fe + 2 HCl → 1 FeCl₂ + 1 H₂

Step2: Balance Na in second equation

2 Na + 2 H₂O → 2 NaOH + 1 H₂

Step3: Balance Al and O in third equation

4 Al + 3 O₂ → 2 Al₂O₃

Step4: Balance Mg and N in fourth equation

1 Mg + 2 HNO₃ → 1 Mg(NO₃)₂ + 1 H₂

Step5: Balance Zn in fifth equation

1 Zn + 2 HCl → 1 ZnCl₂ + 1 H₂

Step6: Balance Na and S in sixth equation

1 H₂SO₄ + 2 NaOH → 1 Na₂SO₄ + 2 H₂O

Step7: Balance Ca and P in seventh equation

3 CaCl₂ + 2 Na₃PO₄ → 1 Ca₃(PO₄)₂ + 6 NaCl

Step8: Balance Fe and Cl in eighth equation

1 FeCl₃ + 3 NaOH → 1 Fe(OH)₃ + 3 NaCl

Step9: Balance Ba and Cl in ninth equation

1 BaCl₂ + 1 Na₂SO₄ → 1 BaSO₄ + 2 NaCl

Step10: Balance Ca and N in tenth equation

2 HNO₃ + 1 Ca(OH)₂ → 1 Ca(NO₃)₂ + 2 H₂O

Step11: Balance Al and N in eleventh equation

2 Al + 6 HNO₃ → 2 Al(NO₃)₃ + 3 H₂

Step12: Balance Mn and Cl in bonus equation

2 KMnO₄ + 16 HCl → 2 KCl + 2 MnCl₂ + 5 Cl₂ + 8 H₂O

Answer:

1. 1 Fe + 2 HCl → 1 FeCl₂ + 1 H₂
2. 2 Na + 2 H₂O → 2 NaOH + 1 H₂
3. 4 Al + 3 O₂ → 2 Al₂O₃
4. 1 Mg + 2 HNO₃ → 1 Mg(NO₃)₂ + 1 H₂
5. 1 Zn + 2 HCl → 1 ZnCl₂ + 1 H₂
6. 1 H₂SO₄ + 2 NaOH → 1 Na₂SO₄ + 2 H₂O
7. 3 CaCl₂ + 2 Na₃PO₄ → 1 Ca₃(PO₄)₂ + 6 NaCl
8. 1 FeCl₃ + 3 NaOH → 1 Fe(OH)₃ + 3 NaCl
9. 1 BaCl₂ + 1 Na₂SO₄ → 1 BaSO₄ + 2 NaCl
10. 2 HNO₃ + 1 Ca(OH)₂ → 1 Ca(NO₃)₂ + 2 H₂O
11. 2 Al + 6 HNO₃ → 2 Al(NO₃)₃ + 3 H₂

Bonus: 2 KMnO₄ + 16 HCl → 2 KCl + 2 MnCl₂ + 5 Cl₂ + 8 H₂O