12. Given the Pd-Ru binary phase diagram shown below, find the relative amounts of the Pd-rich phase and the Ru-rich phase at 1200°C for an overall concentration of 40 wt% Ru. What is the concentration of each of these phases (in wt% Ru) at this temperature? (You will need to use a ruler or a software measuring tool to perform the lever rule calculation.) Temperature °C 10 2400 2200 2000 1800 1600 1555°C 1400 1200 1000 800- (Pd) Atomic Percent Ruthenium 40 50 60 20 20 30 L 70 80 90 100 2334°C 1583°C 82 (Ru) 16.5 600 0 10 20 30 Pd 40 50 60 Weight Percent Ruthenium 70 80 90 100 Ru

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