Question

it is a compound but sea water is a mixture give four reason to support your answer

Answer 1

So, it is a mixture! If it is clear, it is a homogeneous mixture.
1)Many compounds mixed together with a solvent is a mixture.
2)There are many different ions in sea water, chloride, iodide, bromide, sodium, potassium, calcium, magnesium, carbonate, and many different compounds provide those ions.