Normal (fresh) water freezes faster than salt water because salt contains NaCi and it breaks down the ice so it takes longer to freeze also salt water will not remain frozen as long as fresh water. Hope this helped.
If there is enough salt in the water it can freeze but it has to be colder than fresh, 28.4 degrees F....so fresh water freezes at 32 degrees F..... so you answer is fresh water freezes faster since salt lowers the freezing temperature.
At 32 degrees, salt water won't even freeze, do fresh water, definitely. I can't even believe so many people said salt water. it's why the oceans don't freeze when it's winter, unless it's near the poles, or in the arctic circles.