5274
The results show that Cr ( VI ) is easily reduced to Cr ( III ) by a homogeneous aqueous reaction with . e ( aq ) ( - ) , but , due to the stability of Cr ( III ) colloids , the growth of the Cr ( OH ) ( 3 ) particles is very slow .
 Chemical: Cr ( VI ); Chemical: Cr ( III ); Chemical: Cr ( III ); Chemical: Cr ( OH ) ( 3 )
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Cr ( VI ), Cr ( III ), Cr ( III ), Cr ( OH ) ( 3 ) 
Answer:
 Chemical: Cr ( VI ); Chemical: Cr ( III ); Chemical: Cr ( III ); Chemical: Cr ( OH ) ( 3 )