Question

directions: balance the following equations:

1. _ nai + _ f₂ → _ naf + _ i₂
2. _ ca + _ n₂ → ___ ca₃n₂
3. _ pb(clo₂)₄ + _ zn(so₄) → _ pb(so₄)₂ + _ zn(clo₂)₂
4. _ li(oh) → _ li₂o + ___ h₂o
5. _ cr + _ o₂ → ___ cr₂o₃
6. _ kclo₄ → _ kcl + ___ o₂

Explanation:

Step1: Balance the first equation

For \(NaI + F_2
ightarrow NaF+I_2\), balance \(I\) and \(F\) atoms.
\(2NaI + F_2
ightarrow 2NaF+I_2\)

Step2: Balance the second equation

For \(Ca + N_2
ightarrow Ca_3N_2\), balance \(Ca\) atoms.
\(3Ca + N_2
ightarrow Ca_3N_2\)

Step3: Balance the third equation

For \(Pb(ClO_2)_4+ZnSO_4
ightarrow Pb(SO_4)_2+Zn(ClO_2)_2\), balance \(SO_4\) and \(ClO_2\) groups.
\(Pb(ClO_2)_4 + 2ZnSO_4
ightarrow Pb(SO_4)_2+2Zn(ClO_2)_2\)

Step4: Balance the fourth equation

For \(LiOH
ightarrow Li_2O + H_2O\), balance \(Li\) atoms.
\(2LiOH
ightarrow Li_2O + H_2O\)

Step5: Balance the fifth equation

For \(Cr+O_2
ightarrow Cr_2O_3\), use the least - common multiple for \(O\) atoms.
\(4Cr + 3O_2
ightarrow 2Cr_2O_3\)

Step6: Balance the sixth equation

For \(KClO_4
ightarrow KCl+O_2\), balance \(O\) atoms.
\(2KClO_4
ightarrow 2KCl + 4O_2\)

Answer:

1. \(2\ NaI+1\ F_2

ightarrow 2\ NaF + 1\ I_2\)

1. \(3\ Ca+1\ N_2

ightarrow 1\ Ca_3N_2\)

1. \(1\ Pb(ClO_2)_4+2\ ZnSO_4

ightarrow 1\ Pb(SO_4)_2+2\ Zn(ClO_2)_2\)

1. \(2\ LiOH

ightarrow 1\ Li_2O+1\ H_2O\)

1. \(4\ Cr + 3\ O_2

ightarrow 2\ Cr_2O_3\)

1. \(2\ KClO_4

ightarrow 2\ KCl+4\ O_2\)