Remember to include your reasoning and explanations in your answers and answer every question. You should have at least three references with in-text citations where you used the sources. It is not acceptable to have an answer be entirely quotes; put it into your own words and cite and give an explanation of the answer. For question 4 part a, you must include the rearranged Ka expression for hydronium concentration. For 4b, you can choose one of the conditions listed (you do not need to solve all, just one) and calculate pH. You must show every step of your calculation with units where appropriate. Please use an equation editor.