Write your answer in the space provided. Show your calculations to get full credit. A 1.0 M solution of a compound with 2 ionizable groups (pKaʼs = 6.2 and 9.5; 100 mL total) has a pH of 6.8. If a biochemist adds 60 mL of 1.0 M HCl to this solution, the solution will change to which pH?

ug Facts CHM2046 Drug Facts (continued pH and Buffers 1. A solution of a weak acid was tested with the following indicators and the colors noted: Methyl Violet - violet Thymol Blue - yellow Methyl Yellow - yellow Congo Red - orange Bromcresol green - green What is the approximate pH of the solution? St. Petersburg College An acid (HA) dissociates as follows: HA → H* + A*

How many grams of NaA (61.41 g/mol) would need to be added to 544 mL of 1.75 M HA to produce a solution with a pH equal to 5.49? Report your answer to the tenths place. The Ka of the weak acid (HA) is 7.6 × 10-7.

Which of the following statements is true? A. A weak acid solution can be diluted with enough water to produce a solution with a pH greater than 7.00 at 25°C. B. Diluting a weak acid solution by a factor of ten will always decrease its pKa by 1. C. A weak base solution will always have a lower concentration of OH‒ than a strong base solution. D. A weak base solution will always have a pH of 7.00 or greater at 25°C.   D. Correct   Why is C false and not true??