Identify Aunt Sally's malapropism in the dialogue that follows and explain how it contributes humor to the scene "No- not impudent .. whelps..give me that smack."

When looking at the dialog in context; the malapropism is when Aunt Sally uses the word purified rather than petrified. The humor itself is derived from the fact that even Aunt Sally can occasionally mix up her words. In addition, the mistake makes her look not quite as educated as she thinks herself to be.