"Acids are substances whose aqueous solutions turned blue litmus red and tasted sour " stated by

Explanation

The correct answer is Robert Boyle. Boyle is known for his early work in chemistry, where he described the properties of acids, including their sour taste and their ability to turn blue litmus paper red. This definition is fundamental to the understanding of acids in chemistry. The other scientists, while significant in their own right, did not define acids in this manner. Davy focused on electrochemistry, Liebig contributed significantly to organic chemistry, and Rouelle had different contributions unrelated to the litmus test for acids.