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Question:

Please help me with chemistry problem!!?

Aluminum reacts with Sulfuric acid to produce aluminum sulfate and hydrogen gasHow many grams of aluminum sulfate would be formed if 250 g H2SO4 completely reacted with aluminum? 2Al(s) + 3H2SO4 -gt; Al29SO4)3(aq)+3H2(g)

Answer:

not knowing the recipe makes answering this a little tough, but generally speaking you should have no difficulty when using disposable aluminum pans when baking (I use them all the time)It sounds like your oven is either not preheated before you start or the oven is not retaining a steady temp while bakingget an oven thermometer and check for any inconsistenciesThe other issue that also comes to mind, is some zucchini are very moist and may need to be patted dry or lightly squeezed in a towel before mixing into the batter for use.
It could be that your oven bakes differently than the one used in testing the recipeIf the bread isn't baked all the way, it will fall after you take it outI recommend using a knife to test the zucchini bread before you actually take it out of the ovenIt's simple: insert a sharp, non serrated knife into your breadIf it comes out clean (very few crumbs), the zucchini bread is doneIf it doesn't come out clean, bake it longer.
oven thermometers are inexpensive at any housewares aisles in any store! get one to check the temp of your ovenSame with timers! maybe the one on your stove is old and slow! pan should have nothing at all to do with whether your breads get done or notI have used those aluminum pans for gift giving without removing the bread from the pan, very old sheet steel pans, new heavy aluminum pans, ceramic pans, pyrex pans, corning pans, and cast iron pans! I can put a bunch of different pans in the oven at the same time and get good results from temperature and time recommended.
Quick bread has a tendency to remain a bit moist in the centerThe zucchini bread is fine and you will not notice it as much if you toast the slicesThey taste better that way anywayNext time you make a quick bread run the back of the spoon down the center of the loaf making a shallow indentationThe batter pushed aside will be distributed to the edges so the edges have a bit more batterIt will even out as the bread bakes but it will give the center a chance to bake a bit more evenlyI don't even worry about itBesides I like zucchini bread and banana bread toasted far better than just a slice.
You need to determine the molar mass of H2SO4, then divide that by 250g givenThen use the molar ratio between H2SO4 and aluminum sulfate to get your units to cancel and leave you with moles of aluminum sulfateFinally, multiply that number by the molar mass of aluminum sulfate, and that should be your answer.

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