Protein function is directly related to the structure of that protein. A protein's specific shape determines its function. if the structure of the protein is altered because of a change in the structure of the amino acids, the protein becomes denatured and does not perform its function as expected.
 
        
                    
             
        
        
        
Answer: Precipitation is roughly equal to the amount of evaporation
        
             
        
        
        
Though there's no question in the statement above I would assume that you are asking about the pH of the water that is acidic. The correct statement would be:
Any liquid that has a pH less than 7 is called acidic, a pH above 7 is basic or alkaline. 
The water in the swimming pool has a high acid concentration due to the chlorine which causes the effect of redness in the eyes.