Why would ethyl alcohol not be a good solvent to use with water in an extraction

Because ethyl alcohol is miscible in water

Explanation:

Ethyl alcohol (or ethanol) has a polar group, -OH, so it has strong interactions with another polar compounds, such as water. This is why ethanol is miscible in water. In an extraction, the idea is for the solute to move from one solution to another, with clear, different phases. When we add ethanol to water, there's still only one phase.

A non-polar solvent, such as an ether, would be a better choice to use with water in an extraction.

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

  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-