Question

O solutie de acid sulfuric are o concentratie procentuala de 98% si densitate de 0.8 g/cm^3 , are o molaritate egala cu :
Va rog ,ajutati ma. Am pus 25 de puncte.
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Answer 1

c% = mdx100/ms

=> md = msxc%/100

Cm = md/MxVs

=> md = CmxMxVs

=> msxc%/100 = CmxMx1

ro = p = ms/Vs => ms = px1000

=> pxc%1000= CmxMx100

=> Cm = pxc%x10/M

M.H2SO4 = 98 g/mol

=> Cm = 0,8x98x10/98 = 8 M