Submitted by admin on Mon, 04/21/2014 - 22:15
definition:
The level of acid in substances such as water, soil, or wine
sentence:
Organic farming has many benefits to the environment since it prevents soil and water contamination by chemicals which reduce soil fertility and increase acidity.
In trying to link the acidity of rainfall to the acidity of soils and water it is essential to understand the role that soils play in releasing chemicals into solution as a result of natural weathering.
difficulty:
hard
toefl frequency:
2
toefl classification:
adverb:
adjective:
acidic
adverb sentence:
adjective 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.
verb:
verb sentence: