3.

What are the missing coefficients for this skeleton equation?

Al 2 (SO 4) 3 (aq) + KOH (aq) → Al (OH) 3 (aq) + K 2 SO 4 (aq)

1, 3, 2, 3

1, 6, 2, 3

4, 6, 2, 3

The answer to your question is the second option

Explanation:

Reaction

Al₂ (SO₄) ₃ + KOH ⇒ Al (OH) ₃ + K₂SO₄

Process

1. - Check if the reaction is already balanced

Reactants Elements Products

2 Aluminum 1

3 Sulfur 1

13 Oxygen 7

1 Potassium 2

1 Hydrogen 3

The reaction is unbalanced

2. - Balance the reaction

1Al₂ (SO₄) ₃ + 6KOH ⇒ 2Al (OH) ₃ + 3K₂SO₄

Reactants Elements Products

2 Aluminum 2

3 Sulfur 3

18 Oxygen 18

6 Potassium 6

6 Hydrogen 6

Now the reaction is balanced. The coefficients are 1, 6, 2, 3.

1, 6, 2, 3.

Explanation:

Al 2 (SO 4) 3 (aq) + 6KOH (aq) → 2Al (OH) 3 (aq) + 3K 2 SO 4 (aq)