Answer:
2Na + K₂S → 2K + Na₂S. "replacement reaction"
Step-by-step explanation:
To balance the equation, you should apply the law of conservation of mass for the equations.
The law of conservation of mass states that the no. of each atom is equal in both sides (reactants and products).
So, the given equation is balanced as:
2Na + K₂S → 2K + Na₂S.
It is a replacement reaction that Na replace K in K₂S.
That 2.0 moles of Na react with 1.0 mole K₂S to produce 2.0 of K and 1.0 mole of Na₂S.
- The no. of all atoms is the same in both of reactants and products side.
Na (2), K (2), and S (1).