Caution! The site can't guarantee, that text has age permission. The site is not recommended, if you are less than 18 years old.
The site shows example sentences for English words. How the word or phrase could be used in a sentence?
" ... When copper(II) sulfate is added to water, it dissolves quickly. The copper ions combine with four chlorine ions in the water, creating a copper(II) tetrachloro complex, which is green, and if it's present in high enough concentrations, it turns the water green. The sulfate ions are reduced to hydrogen sulfide, a poisonous stinky gas, which is the source of the rotten egg smell associated with raw sewage and farts. ... "