Final answer:
The minimum urine output for a client weighing 25kg in a 12-hour shift is at least 500 mL.
Step-by-step explanation:
The minimum urine output a client weighing 25kg should have in a 12-hour shift is at least 500 mL. This is because the kidneys must produce a minimum urine volume of about 500 mL/day to rid the body of wastes. Output below this level may be caused by severe dehydration or renal disease and is termed oliguria.