They conclude that the Krichevsky-Kasarnovsky Equation, which can be derived from Henry’s Law, can be used to model the system CO2-H2O at temperatures below 100 oC. Applying the above to the conditions under investigation: CO2 + H2O <=> H2CO3 as water donates a proton it is considered a weak acid facing CO2 which accepts it, but on the other hand the resulting carbonic acid although weak is stronger an acid than water, the resulting molecule is more like an adduct. 6CO2 + 6H2O -----> C6H12O6 + O2 Thus in the range of interest, 20-35 °C, the Henry coefficient for CO2 in water goes from 150 - 200 MPa/mole fraction. We can fix this by multiplying the water by an even number. Since there are 12 Hydrogens on the right, we need 6 H2O to balance, as there are 2 Hydrogens in each. We also notice that as it now stands we have an odd number of oxygen molecules on the right and an even number on the left, which won't work. Examples of Equations you can enter: KMnO4 + HCl = KCl + MnCl2 + H2O + Cl2; KMnO4 + (HO2C)2= CO2 + H2O + KMn(OH)2; MnO4- + H2C2O4 + H+ = Mn++ + CO2 + H2O In this case it's carbon. C_3H_8 + 5O_2 -> 3CO_2 + 4H_2O We have: C_3H_8 + O_2 -> CO_2 + H_2O I would always start by balancing the elements that only occur once on each side. 6CO2 + H2O -----> C6H12O6 + O2. Read our article on how to balance chemical equations … That is a reaction that will go on on its own, once you give it a little push, much like a rock rolls downhill. Since you have minimum 6 Carbons on the right, you need at least 6 CO2 to balance the Carbon, as CO2 has only 1 each. If you look at the equation backwards it reminds you of oxidation (burning) of a carbohydrate: C6H12O6+O2=CO2+H20. In photosynthesis in plants, the ultimate reaction is 6 CO2 + 6 H2O and with the addition of the energy from sunlight, the plant is able to convert these into C6H12O6 + 6 O2 (or glucose and oxygen). You can use parenthesis or brackets []. Compound states [like (s) (aq) or (g)] are not required. How To Balance Equations. For example, C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will. Examples of Equations you can enter: KMnO4 + HCl = KCl + MnCl2 + H2O + Cl2; KMnO4 + (HO2C)2= CO2 + H2O + KMn(OH)2; MnO4- + H2C2O4 + H+ = Mn++ + CO2 + H2O The Carbon is balanced, so let's try to balance the Hydrogen now.