Task: Question Answering
Input (English): Question: Eric measures 20 hydrogen ions per 100ml in one solution. Another solution has 30 hydrogen ions per 100ml. The solution with less hydrogen ions is _____ acidic. 
 Option1: more 
 Option2: less 
 Explanation: With a higher concentration of hydrogen ions, a solution is more acidic but has a lower pH.
Output (English): less