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September 30, 2014

September 30, 2014

Posted by **Eli** on Monday, October 31, 2011 at 8:53am.

Au + Pb = Au-Pb left over

- Chemistry -
**Dr Russ**, Monday, October 31, 2011 at 9:00amNot a great deal of chemistry here as it is by proportion.

He melted 30 grams of Au (gold) with 30 grams of Pb. This melting process resulted to 42 grams of an Au-Pb alloy and some leftover Pb.

So assume all the gold is incorporated then (42-30) g of lead used, which is 12 g.

Thus for each 42 g of alloy, 30 g of gold and 12 g of lead are needed.

Hence for 420 g (42 g x 10), 300 g (30 g x 10) of gold and 120 g (12 g x 10)of lead are needed.

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