Which of these equations is balanced? 1. 4Sb + 3O2 → Sb4O6

2. H3 AsO4 → As2O5 + H2O

3. SiO2 + HF → SiF4 + H2O

4. CO2 + NH3 → CO(NH2)2 + H2O

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter