How do you calculate the salt content of a water sample if u have 480mg/L of chloride and 291mg/L of sodium?
Answer:
Salt is Sodium Chloride, NaCl. The sodium and chloride are in a 1:1 ratio so the first thing you need to do is find the limiting reactant (which you have less of).
Convert each into moles first.
Sodium is 23 g/mol
so 291mg = ~.013 mol
Chlorine is 35.5 g/mol
so 480mg = ~.013 mol
Since neither is limiting and theoretically every single Na bonds to every Cl, then you end up with ~.013 mol of NaCl.
At 58.5g/mol for NaCl
~.013 mol = ~761mg Salt in this one liter of water.
Or you might have zero salt if it is dissolved. The Na and Cl ions are separated from each other in the water and aren't technically salt. :)
How much water do you have?
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