(Answered) A sample of pressure-treated wood weighing 03245 g was

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A sample of pressure-treated wood weighing 0.3245 g was dissolved in concentrated nitric acid to convert all of the arsenic to arsenate. The solution was diluted 10 times and excess silver added to precipitate silver arsenate (Ag₃AsO₄), which was collected dried and weighed. If the mass of the precipitate was 0.0453 g what is the percentage of arsenic in the wood?

a) 2.26

b) 9.03

c) 22.5

d) 2.24

e) 3.01

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