When a cat drinks soapy water, the chemicals in the soap may irritate the cat's throat and stomach, leading to digestive tract problems, such as nausea, vomiting and diarrhea. At the same time, the chemical composition of soap may also directly damage the internal organs of cats and affect their normal physiological functions.
If a cat dies after drinking soapy water for 6 hours, it may be because the chemical components in soapy water have caused serious harm to the cat, leading to poisoning and irreversible physiological failure. In this case, the cat's life is irreversible.
As for the first aid measures for cats after drinking soapy water, if you witness this situation, I strongly suggest that you contact the veterinary hospital or animal protection agency immediately, ask them for help and follow their instructions. Please remember that only professionals can help your pet in an emergency.