Problema Solution
British sterling silver is a copper-silver alloy that is 7.5% copper by weight.How many grams of pure copper and how many grams of British sterling should be used to prepare 200 grams of a copper-silver alloy that is 10% copper by weight?
Answer provided by our tutors
From the given information, we can write:
.075(x)+ 1(200-x)=.1(200)
Where 'x' is the amount (in g) of 7.5% copper needed and '200-x' is the amount (in g) of 100% copper needed to make 200g of 10% copper. Solving for 'x' and '200-x' we get:
x=194.59g
200-x=5.41g