The ph of a solution is 2. 0. Which statement is correct? useful formulas include startbracket upper h subscript 3 upper o superscript plus endbracket equals 10 superscript negative p h. , startbracket upper o upper h superscript minus endbracket equals 10 superscript negative p o h. , p h plus p o h equals 14. , and startbracket upper h subscript 3 upper o superscript plus endbracket startbracket upper o upper h superscript minus endbracket equals 10 to the negative 14 power. The poh of the solution is 12. 0. The concentration of oh– ions is 1. 0 mc021-5. Jpg 10–2 m. The concentration of upper h subscript 3 upper o superscript plus. Ions is 100. 0 m. The poh of the solution is 16. 0.