A granulated sample of aircraft alloy (Al, Mg, Cu) weighing 8.72 g was first treated…

CHEMISTRY · Subjective · ISC · Chemistry · Organic Chemistry - Some Basic Principles and Techniques · Organic Chemistry - Some Basic Principles and Techniques

Problem

A granulated sample of aircraft alloy (Al, Mg, Cu) weighing 8.72 g was first treated with alkali and then with very dilute HCl, leaving a residue. The residue after alkali boiling weigh 2.10 g and the acid insoluble residue weigh 0.69 g. What is the composition of the alloy?

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