Your dog had surgery and died 2 days later you went down to see him within 5 min and his gums were white and ears and he was swollen is this normal he made surgery fine He had a spleen that ruptered?

White gums are a sign of internal bleeding. If his spleen ruptured he might have bled to death so quickly that there was no time to react to save him. The swelling might be from the blood filling his body cavity, which would have also drawn blood away from his ears. The things you describe are normal for a ruptured spleen, but only the vet can tell you the cause of that.