Question

Ch4-co2-h2co3-h3co3-co2

Answer 1

CH4->CO2->H2CO3->H3CO3->CO2

CH4+2 O2=CO2+2 H2O

CO2+H2O=H2CO3

H2CO3 + H2O = H3CO3 + OH

4 H3CO3+O2=6 H2O+4 CO2

Answer 2

It appears that you've listed some chemical species and reactions involving carbon dioxide (CO2) and related compounds. Let me break down the reactions for you:

1. CO2 (Carbon Dioxide): This is a colorless, odorless gas composed of one carbon atom bonded to two oxygen atoms. Its chemical formula is CO2.

2. H2CO3 (Carbonic Acid): Carbon dioxide can dissolve in water to form carbonic acid, which is represented by the chemical formula H2CO3.

3. H3CO3+: This notation suggests the presence of hydronium ions (H3O+), which are formed when water molecules act as Bronsted-Lowry acids by donating a proton (H+).

4. CO2 (Carbon Dioxide): In the presence of water, carbonic acid (H2CO3) can dissociate back into carbon dioxide and water.

So, the reactions you're describing can be summarized as follows:

1. CO2(g) + H2O(l) ⇌ H2CO3(aq) - Carbon dioxide dissolves in water to form carbonic acid.
2. H2CO3(aq) ⇌ H3O+(aq) + HCO3-(aq) - Carbonic acid can ionize in water to produce hydronium ions (H3O+) and bicarbonate ions (HCO3-).
3. H2CO3(aq) ⇌ CO2(g) + H2O(l) - Carbonic acid can also decompose back into carbon dioxide and water.

These reactions are important in various biological and environmental processes, including the carbon dioxide transport in the blood and the buffering of pH in natural water systems.