What happens if table vinegar is poured into a kettle whose surface is covered with scale?

1. When boiling water, calcium bicarbonate turns into insoluble carbonate, which causes the formation of scale:

Ca (HCO3) 2 → CaCO3 ↓ + H2O;

2.when adding table vinegar containing acetic acid, a reaction occurs:

CaCO3 + 2CH3COOH → (CH3COO) 2Ca + H2O + CO2, as a result of which calcium acetate is formed and we observe the dissolution of scale, since all acetic acid salts are readily soluble. And the appearance of bubbles indicates the release of carbon dioxide.