Indicators change color gradually across a pH range, and it is common for one of the indicator's forms to be colorless. Since indicators are weak acids, care should be taken to avoid adding too much indicator (more than 3 to 4 drops per 100-mL) to a solution of acid or base.
Roast your pork shoulder in the oven at 350 degrees F for 30 to 35 minutes per pound for a nice slicing roast. At this temperature, a 6-pound pork shoulder will require 3 to 3 1/2 hours to roast. Check for doneness by placing a meat thermometer into the roast at the thickest point. Be careful not to touch the bone.
Tips & Warnings. 1  Cooking time will vary, depending on if the shoulder roast is bone-in or boneless. 2  When purchasing the meat, request the suggested cooking time per pound from the meat department. 3  Cooking times vary from 20 to 45 minutes per pound.