Răspuns :

Roberteladrianpb6zy7id

Vs1 = 50 mL, p = 1,18 g/mL, c1% = 36%

p = ms/Vs => ms1 = pxVs = 50x1,18 = 59 g

c% = mdx100/ms

=> md = ms1xc1/100 = 59x36/100 = 21,24g HCl

c2 = c1/2 = 18%

=> ms2 = mdx100/c2 = 21,24x100/18 = 118 g

=> m.apa.adaugata = ms2-ms1 = 118-59 = 59g

p.apa = 1 g/mL => V.apa = 59 mL

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