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Question:

What is the composition of the alloy?

Hi, Im having some trouble with this chemistry problemAll the help I can get is appreciated! A granulated sample of aircraft alloy (Al, Mg, Cu) weighing 8.72 g was first treated with alkali to dissolve aluminum, then with very dilute HCl to dissolve the magnesium, leaving a residue of copperThe residue after alkali-boiling weighed 2.1 g, and the acid-insoluble residue from this weighed 0.69 g.

Answer:

elmers school glue will work for small applicatiossuper glue for stronger but small applcationsbut for larger scale and strong holding, home depot carries liquid nails in the paint departmenttake your pick.
I would use CA (superglue)Rough up the aluminum with steel wool.
I like Aleene's new glue - a quick tack glue - holds wellDon't know the exact name, but it comes in a purple bottle.
This is a pretty basic questionWe know that the amount lost during alkali boiling is the total amount of aluminum: subtract 2.1g from 8.72g to get 6.62g AlThe residue after acid is the mass of the copper: .69g CuThe mass of Mg is the amount that dissolved in the acid: 2.1g - .69g 1.41gDivide each mass by the total amount of alloy used and multiply by 100% to get the percentage of each element in the alloy(6.62/8.72)100% 75.9% Al (1.14/8.72)100% 13.1% Mg (0.69/8.72)100% 7.9% Cu
elmers school glue will work for small applicatiossuper glue for stronger but small applcationsbut for larger scale and strong holding, home depot carries liquid nails in the paint departmenttake your pick.
I would use CA (superglue)Rough up the aluminum with steel wool.
I like Aleene's new glue - a quick tack glue - holds wellDon't know the exact name, but it comes in a purple bottle.
This is a pretty basic questionWe know that the amount lost during alkali boiling is the total amount of aluminum: subtract 2.1g from 8.72g to get 6.62g AlThe residue after acid is the mass of the copper: .69g CuThe mass of Mg is the amount that dissolved in the acid: 2.1g - .69g 1.41gDivide each mass by the total amount of alloy used and multiply by 100% to get the percentage of each element in the alloy(6.62/8.72)100% 75.9% Al (1.14/8.72)100% 13.1% Mg (0.69/8.72)100% 7.9% Cu

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