The experiment calls for preparing one of two salts, either copper(ii) sulfate or potassium aluminum sulfate. The instructions for the potassium aluminum sulfate preparation give a target of between 0.010 and 0.025 moles of the product. The instructions also specify to use an excess of potassium hydroxide but not more than 2 times the amount required by the balanced equation. Calculate the mass in grams of aluminum needed to prepare the maximum number of moles of product as noted above. Report this mass of aluminum to two significant figures. Do not include units in the answer box. 2 Al(s) 2KOH(aq) 6H2O(l) --> 2KAl(OH)4(aq) 3H2(g) KAl(OH)4(aq) 2H2SO4(aq) --> KAl(SO4)2(aq) 4H2O(l)
