Use Appendix C to answer the following question. A buffer system composed of carbonic acid (H2CO3) and the bicarbonate (hydrogen carbonate, HCO3)ion has a pH of 7.35. Which of the following is the net charge on the acid base pair that exists in this solution? Make sure to use a negative charge if the answer is negative. Use 2 decimal points Use Appendix C to answer the following question. What is the pH if the net charge on species of a phosphate buffer is 2.0 ? (Online) Use a negative charge if your answer is negative. Use 2 decimal points