Question

3. What does the double-ended arrow indicate in

the following chemical equation?
CaCO3 = Ca2+ + CO32-

Answer 1

See below ~

Step-by-step explanation:

The reaction :

• CaCO₃ ⇄ Ca²⁺ + CO₃²⁻

The double sided arrow represents that this is a reversible reaction.

Just as calcium carbonate can dissociate into calcium ion and carbonate ion, it can form calcium carbonate when calcium ion and carbonate ion are bonded together ionically.

Answer 2

⇌ means that the equation is reversible, The reactants can become products and vice versa

Step-by-step explanation: