xBased on the law of constant proportions if you have one kilogram of seawater with an average salinity of 35 PPT the dissolved solids in that one kilogram sample shoul

Question

Based on the law of constant proportions if you have one kilogram of seawater with an average salinity of 35 PPT the dissolved solids in that one kilogram sample should be proportional to each other. So if you have 18.98 g of chloride( CL), you know that you will have ______________g of potassium (K). 

Answer 1

If this is all the information given, the best we can do is first assume that the question only included the first half before mentioning chloride ion mass as extraneous information. Thus, the question becomes how many grams of potassium (K⁺) would be present if 18.98 grams of chlorine (Cl^-) is present. Given the ionic charges, we expect a 1:1 ratio and dividing 18.98 grams by the atomic mass of chlorine yields to us roughly .535 moles, which also means .535 mol potassium. 0.535 mol potassium*39.1 amu = 20.93 grams of potassium.

This answer is contingent on there not being additional information we are unaware of.