Question: THE OTHER POSTS ON CHEGG ARE WRONG. THE CORRECT ANSWER SHOULD BE: aPbO = 0.5 according to the textbook answer key. I will downvote if

THE OTHER POSTS ON CHEGG ARE WRONG. THE CORRECT ANSWER SHOULD BE:

aPbO = 0.5 according to the textbook answer key. I will downvote if you say the answer is 0.25.

The partial pressure of oxygen in equilibrium with pure liquid lead and pure liquid lead oxide at 1200 K is 2.16 10 9 atm. When SiO2 is added to the liquid PbO to form a lead silicate melt, the oxygen pressure in equilibrium with pure liquid lead and the silicate melt is decreased to 5.41 10 10 atm. Calculate the activity of PbO in the lead silicate melt.

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