Subject: Does seminal fluid protects sperm cells in water?

If I leave semen in tap water (not distilled water), does the seminal fluid in 
semen protects sperm cells from coming into contact with water molecules? 

Is the role of semen that to protect the sperm cells from contact with 
external agents like water? Because I know semen protects sperm cells in the 
acidic vaginal environment, so I thought semen might do the same in external 
environment like water?

Is semen soluble in water and leave the sperm cells to fend for themselves in 
water?  

Re: Does seminal fluid protects sperm cells in water?