Unbalanced Equation:

NH₄₂SO₄ + NaOH → NH₃ + H₂O + Na₂SO₄

Balancing Steps:

1. Count the atoms of each element on both sides:

* Left side:

* N: 2

* H: 10

* S: 1

* O: 5

* Na: 1

* Right side:

* N: 1

* H: 5

* S: 1

* O: 4

* Na: 2

2. Balance the elements one at a time:

* Balance Na: Put a coefficient of 2 in front of NaOH.

* Balance N: Put a coefficient of 2 in front of NH₃.

* Balance H: Put a coefficient of 2 in front of H₂O.

Balanced Equation:

NH₄₂SO₄ + 2 NaOH → 2 NH₃ + 2 H₂O + Na₂SO₄

Explanation:

Now, if we count the atoms on both sides, we have:

* Left side:

* N: 2

* H: 12

* S: 1

* O: 6

* Na: 2

* Right side:

* N: 2

* H: 12

* S: 1

* O: 6

* Na: 2

The equation is now balanced!