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Se dizolva 5 moli de H2SO4 in 1000g de H2O. Calculeaza concentratia.

Răspuns :

n = nr moli = m .acid / M (masa moleculara acid = 98)

=> m .acid = n x M = 5 x 98 = 490 g

c% = md = m.acid * 100 / ms

ms = md + m.apa = 490 + 1000 = 1490 g

=> c% = 490 x 100 / 1490 = 32,9%