A 1.000 liter sample of sea water was evaporated to a small volume and treated with an excess of sodium tetraphenylboron. The precipitated tetraphenylboron was filtered and then redissolved in acetone. The analysis was completed by a Mohr titration that required 34.32 ml of 0.03875 M AgNO3. Calculate the parts per million of potassium in the sea water sample. K* + NaB(C,H5)4 → KB(C,H5)4ls) + Na* ; Ag* + KB(C;Hs)4 → AgB(C6H5)4(s) + K*

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