Final answer:
In the context of white phosphorous exposure, metabolic derangement presents as hyperkalemia, and it is associated with EKG changes that include tall T waves due to impaired repolarization of cardiac cells.
Step-by-step explanation:
Exposure to white phosphorous may result in metabolic acidosis due to the accumulation of sulfates, phosphates, uric acid, and other compounds leading to altered enzyme activity and increased excitability of cardiac and neuronal membranes, promoting hyperkalemia as a metabolic derangement. Hyperkalemia, the elevation of potassium blood levels, can influence the heart's function and result in characteristic EKG changes. One of these changes may include tall T waves, which can result from the impaired repolarization due to the increased potassium levels.