I scarcity the anwer solely ce topic 4 yet mayhap you scarcity to select a seem environing topic 2 and 3 so I shaft them too
Topic 4 (3 points) Supposed another ward told you he fitted the compute of grams of Al in the pristine 250.00 mL disintegration to be 1.788 g and that he compliant that disintegration by dissolving 4.5800 g of a sound mysterious in infiltrate, what is the wt % Al3+ in the pristine sound scantling?
4) The ward dissolved 4.5800 g of a sound junction containing Al3+ and made up the disintegration to 250.00 mL. The gravimetric decomposition of the scantling render 1.788 g Al3+.
Wt% Al3+ in the scantling = (heap of Al3+ obtained)/(heap of scantling)*100 = (1.788 g)/(4.580 g)*100 = 39.0393% ≈ 39.039% (ans).