Question

peste 500g saramura de concentratie 20% se adauga 50g sare. calculati concentratia solutiei obtinute
Repede va rogggg ​

Answer 1

ms1 = 500 g

c1% = 20%

m= 50 g

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c2% = ?%

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stim ca c% = mdx100/ms

md1 = ms1xc1/100 = 500x20/100 = 100 g

=> md2 = md1 + m = 100 + 50 = 150 g

=> ms2 = ms1 + m = 500 + 50 = 550 g

=> c2% = md2x100/ms2 = 150x100/550 = 27,27%