Sodium hydrogen carbonate decomposes (breaks down) to form sodium carbonate, carbon dioxide, and water. Write a skeleton equation for this reaction. Begin by identifying the reactant(s) and product(s).

The equation is:

2NaHCO₃ →  Na₂CO₃  +  CO₂ + H₂O

Explanation:

We identify the reactant

NaHCO₃ → Sodium bicarbonate

We identify the products:

Na₂CO₃, CO₂ and H₂O

2 moles of sodium bicarbonate decomposes to produce 1 mol of water, carbon dioxide and sodium carbonate

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6