Question

How would the freezing point of seawater compare with that of pure water? a)higher b) lower c) the same d) ten times higher

Answer 1

The answer would be B) Lower, because pure water freezes at 32 degrees Fahrenheit whereas salt water freezes at 28.4 degrees Fahrenheit. Hopefully this helps!

Answer 2

Freezing point of seawater is lower as compared to pure water

Step-by-step explanation:

Seawater contains salts like
`MgCl_(2)`, NaCl etc.

According to colligative properties of molecules, presence of solute in a pure solvent lowers freezing point of pure solvent obeying the following equation-

`\Delta T_(f)=k_(f).m`

where
`\Delta T_(f)` is lowering of freezing point,
`k_(f)` if cryogenoscopic constant of solvent and m is molality of solution.

In seawater, water is the solvent and
`MgCl_(2)`, NaCl etc are solutes.

Hece freezing point of seawater is lower than pure water