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July 24, 2014

July 24, 2014

Posted by **Jim** on Thursday, September 13, 2007 at 3:37pm.

An ore contains 2.79 g of silver per ton of ore. What is the concentration of silver in ppm?

My Answer: 0014164.8

- Chemistry -
**DrBob222**, Thursday, September 13, 2007 at 5:32pmI don't like to use ppm BUT 1 ppm = 1 part per 1,000,000 parts and it's easier to just say 1 gram per 1,000,000 grams. So 2.79 g Ag in 2,000 g ore is the same as 1395 g Ag in 1,000,000 g ore. Just set up a proportion like this

(2.79 g Ag/2,000 ore) = (x g Ag/1,000,000 g ore) and solve for x.

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