Question: please answer both and show work thank you!! 9. Which of the following pairs of aqueous solutions will form a precipitate when mixed? A. KOH+Na2S

please answer both and show work thank you!!

9. Which of the following pairs of aqueous solutions will form a precipitate when mixed? A. KOH+Na2S B. (NH4)2SO4+KI C. Ca(C2H3O2)2+Na2SO4 D. KNO3+LiOH E. None of the above solution pairs will produce a precipitate. 10. How many grams of iron metal are formed if 81.0 grams of aluminum metal reacts with exce Fe2O3 in the following reaction? A. 168g 2Al+Fe2O3Al2O3+2Fe B. 112g C. 81.0g D. 55.8g E. 39.1g

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