Question

Am nevoie urgent! Se amesteca 300 g solutie alcoolica de concentratie procentuala 10% cu 200 g solutie alcoolica de concentratie procentuala 20%. Care este concentratia procentuala a solutiei finale obtinute? Multumesc anticipat.

Answer 1

ms1 = 300g, c%= 10%

ms2 = 200g, c2% = 20%

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c%.final = ?%

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stim ca c%= mdx100/ms

=> md1 = ms1xc1/100 = 300x10/100 = 30g

=> md2 = ms2xc2/100 = 200x20/100 = 40g

=> md.final = md1+md2 = 70g

=> ms.final = ms1+ms2 = 200+300 = 500g

=> c%final = md.final/ms.final = 70x100/500 = 14%