water analysis of loch in Scotland?

Question

The table below is an analysis of the water in natural loch in Scotland

colour hazen units:12.5

TDS:65 mg/l, CL:15 mg/l, SO4 :28.2, Na 6.0 mg/l, K:.83 mg/l,Ca:12.03,Mg:1.701 mg/l

what's your comment briefly on:

1-whether the oxygen content of the water would be expected to be higher / lower in winter compared to summer ?

2-whether the oxygen content would be expected to be higher / lower than on seawater at the same temperature

Answer 1

1. the water should contain a higher oxygen level during the winter than in the summer.
2. water in the ocean would have a lower amount of dissolved oxygen, because oxygen will not dissolve in water high in suspended or dissolved solids. the higher the salt content of the water, the less oxygen will dissolve.