Calculate the theoretical yield of potassium alum from 1.0000 g of aluminum, assuming that the aluminum is the limiting reagent. First, write the net reaction by adding the net ionic equations that represent the four steps in the synthesis: (view image for reactions)

Write the net reaction by adding these four reactions and canceling out species that appear on both sides.

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Net Reaction is,

For total yield,

as the moles are 2 for both aluminium and potash alum if we divide 1 gm by the mass of Al the outcome mole will be 0.3. since the moles are same so potash alum will also have 0.3 mole. Now multiply 0.3 moles by the mass of potash alum that is 474 so the ANSWER FOR THE YIELD WILL BE 142.2 gms

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the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.