Final answer:
The formula for calcium bicarbonate is Ca(HCO3)2. It is a compound with the atomic ratio of Ca:C:O being 1:1:3. The reaction to produce baking soda from sodium carbonate involves water and carbon dioxide and is a Brønsted-Lowry acid-base reaction where CO2 acts as an acid.
Step-by-step explanation:
The formula for calcium bicarbonate, also known as calcium hydrogen carbonate, is Ca(HCO₃)₂.
- Calcium carbonate is not an element but a compound because it is composed of more than one kind of element chemically combined in a fixed ratio.
- The ratio of Ca : C : O atoms in the formula CaCO₃ is 1:1:3.
Baking soda, or NaHCO₃, is produced in a reaction that can be represented by the balanced equation: Na₂CO₃ + H₂O + CO₂ → 2 NaHCO₃. Properly balanced, the equation reflects the stoichiometry of the reactants and products involved in the reaction.
As for whether this is a Brønsted-Lowry acid-base reaction: yes, it is. A Brønsted-Lowry acid is a substance that can donate a proton (H+), and a Brønsted-Lowry base is one that can accept a proton. In this reaction, carbon dioxide (CO₂) acts as an acid because it reacts with water to form H₂CO₃ (carbonic acid), which then donates a proton to form bicarbonate (HCO₃⁻).