The hydrogen sulfate or bisulfate ion HSO4– can act as either an acid or a base in water solution. In which of the following equations does HSO4– act as an acid?

How many moles of solid NaF would have to be added to 1.0 L of 1.90 M HF solution to achieve a buffer of pH 3.35? Assume there is no volume change. (Ka for HF = 7.2 ´ 10–4)

Solubility Products (Ksp)                         BaSO4             1.5 ´ 10–9              CoS                 5.0 ´ 10–22                         PbSO4             1.3 ´ 10–8              AgBr               5.0 ´ 10–13

Honorlock will be used for Lecture, Lab and the Final Exams. There is no Honorlock on Chapter Quizzes. 

At 0°C, the ion-product constant of water, Kw, is 1.2 ´ 10–15. The pH of pure water at 0°C is:

   Which of the following statements is true regarding hepatitis?

The varicella rash typically progresses in the following order:

    A 44 year old woman presents to your office in the afternoon with complaints of abdominal pain, rating the pain as an 8/10 on pain scale.  She states the pain started abruptly approximately 6 hours ago and is mainly in her right upper quadrant and right shoulder.  She ate a sausage and cheese casserole early this morning but, has vomited several times over the past two hours. She appears in acute distress and is lying very still on the exam table.  VS= Temperature- 100.4º F; BP- 124/84; Pulse- 110 bpm; Respirations- 20.  On exam she has abdominal guarding and a positive Murphy’s sign.   What is her most likely diagnosis?

    A 48 year old woman presents to your office for examination because she had “severe” abdominal pain yesterday.  Just when she was about to go to the emergency, the pain completely resolved.  She reports that the pain started abruptly and lasted about 90 minutes.  She denies that she had any associated symptoms of nausea, vomiting, fever, or malaise.  She says the pain was about a 8/10 on a pain scale.  On exam today: T- 98.2ºF; BP- 118/66; Pulse- 78 bpm; Respiratory rate- 18/min.  She does not have abdominal guarding and has a negative Murphy’s sign.  Her most likely diagnosis is:

   In order to meet the requirements for constipation, stool must meet which criteria for ≥ 25% of defecations in the last 3 months