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You need to use KH2PO4 and K2HPO4 to prepare a buffer with a pH of 7.45. Which of the following ratios of [base]/[acid] is required? For phosphoric acid, (H3PO4), Ka2 = 6.2 × 10–8.  

Calculate the minimum concentration of Ag+ ion that must be added to (or built up in) a 0.140 M Na2CrO4 solution in order to initiate a precipitation of silver chromate.  The Ksp of Ag2CrO4 is 1.2 × 10‑12.

Which species would be expected to be the most acidic?

Over a long period of time, a research team monitored the number of car accidents which occurred during rush hour in a particular county. The  following table summarizes the data relating to the day of the week on which an accident occurred. Day Monday Tuesday Wednesday Thursday Friday Number 201 192 189 193 225

Which of the following acids has the lowest pH? 0.1 M HBO, pKa = 2.43 0.1 M HA, pKa = 4.55 0.1 M HMO, pKa = 8.23 0.1 M HST, pKa = 11.89

What therapeutic factor is the ability of a participant to express his/her thoughts and feelings while practicing and resolving differences with others in the group?

Equal volumes of the following pairs of solutions are mixed. Which pair will produce a buffer solution?  

You work at an outpatient TBI clinic. You are creating an eight-week cooking group.  The purpose of your group is to provide members with functional skills to safely complete simple meal prep tasks (long term goal: Members will independently complete a simple meal prep task by the end of the last session).   A new kitchen tool or appliance will be introduced during the first seven sessions.  Recipes will increase in difficulty over the course of the group to incorporate skills learned in previous sessions.  The final session will provide members an opportunity to attempt to independently follow a recipe.  Observations made during the final session will allow you assess each member’s level of independence in completing a simple meal prep task.  This information will be used to make discharge recommendations for each member. Which short term goal below is written in SMART format and relates directly to the purpose of your group?

You are leading a cooking group in an outpatient traumatic brain injury facility. You have four group members.  All members are between ACLS level 4.0-4.8.  Each participant has demonstrated the ability to gather supplies, sit at a table, and make a peanut butter sandwich.  In order to challenge the participants, you decide to introduce a homemade bread recipe.  You are hoping to improve socialization between the members by using a collaborative approach to complete the task.  Each patient will have a different step in the task. Using a sensorimotor approach, match the patient job responsibility that would likely be most difficult for each patient.

What is the solubility, in moles per liter, of PbSO4 (Ksp = 6.3 × 10-7) in 0.0230 molar MgSO4 solution?