+ + + C, H,O NaHCO Но NaC, H,O, sodium acetate CO2 carbon dioxide water acetic acid sodium bicarbonate 9. The above chemical equation shows the chemical reaction between acetic acid (vinegar) and sodium bicarbonate (baking powder). Use the table below to explain how we can tell a chemical reaction took place. (hint: what do we know about substances and their properties?) Boiling Point (degrees celsius) Freezing Point (degrees celsius) Density (g/mL) Acetic Acid 118 16.6 1.05 Sodium Bicarbonate 851 11.11 2.2 Sodium acetate 881 324 1.53 Water 100 997 Carbon Dioxide -78.46 -78 1.98​

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Explanation:

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-