Density of ocean water with 35,000 ppm of salts is about 1.027 kg/L
Hence your calculations are underestimated by ~3 %
Thanks. How about this then:
19,000ppm x 10-6 = 0.019g
10,500ppm x 10-6 = 0.0105g
2650ppm x 10-6 = 0.00265g
1350ppm x 10-6 = 0.00135g
400ppm x 10-6 = 0.00040g
380ppm x 10-6 = 0.000380g
140ppm x 10-6 = 0.000140g
65ppm x 10-6 = 0.000065g
D=M/V
1027g/L = (?g) (1L)
1027g = total mass
Mass percent: mass of component / total mass
x / 1027 = 0.019g 19.5g of Cl-
x / 1027 = 0.0105g 10.8g of Na+
x / 1027 = 0.00265g 2.72g of SO42-
x / 1027 = 0.00135g 1.39g of Mg2+
x / 1027 = 0.00040g 0.41g of Ca2+
x / 1027 = 0.000380g 0.390g of K+
x / 1027 = 0.000140g 0.144g of HCO3-
x / 1027 = 0.000065g 0.067g of Br-
Molecular masses (amu): Cl=35.5, Na=23.0, SO4=96.1, Mg=24.3, Ca=40.1, K=39.1, 61.0g=HCO3, Br=79.9
19.5g x 1mol / 35.5g = 0.55mol Cl-
10.8g x 1mol / 23.0g = 0.470mol Na+
2.72g x 1mol / 96.1g = 0.0283mol SO42-
1.39g x 1mol / 24.3g = 0.0572mol Mg2+
0.41g x 1mol / 40.1g = 0.010mol Ca2+
0.390g x 1mol / 39.1g = 0.00997mol K+
0.144g x 1mol / 61.0g = 0.00236mol HCO3-
0.067g x 1mol / 79.9g = 0.00084mol Br-
Total moles: 1.13moles
M = 1.09moles / 1L = 1.13M