acidic

definition: 
Having the properties of an acid, or containing acid; having a pH below 7
sentence: 
When this compound is dissolved in water, an acidic solution of hydrogen cyanide, also known as prussic acid, is produced. A method called scrubbing is used to chemically remove the acidic sulfur dioxide by putting it into contact with calcium carbonate.
difficulty: 
easy
toefl frequency: 
2
toefl classification: