Acidity Which of the following statements are correct, and which are wrong? 1.) A solution with an H3O+-concentration of 1104molL1 has pH4. 2.) A solution with an OH-concentration of 1104molL1 has pH10. 3.) A neutral solution (pH7) does not contain H3O+-Ions. 4.) For weak acids the following is valid: pH=lg (acid concentration). 5.) For strong acids the following is valid: pH=lg (acid concentration)