1.
md = 50g, m.apa = 100g
ms = md+m.apa = 50+100 = 150g sol.
c% = mdx100/ms
= 50x100/150 = 33,33%
Cm = md/miuxVs, considerem Vs = 100 mL (apa) =0,1 L
M.H2SO4 = 2x1+32+4x16 = 98 g/mol
Cm = 50/98x0,1 = 5,1 mol/L (M)
Cn = md/EgxVs
Eg.acid = M/nr. H+ = 98/2 = 49g
=> Cn = 50/49x0,1 = 10,2 Eg/L (N)
2.
Vs = 100 mL (cm3), ro.sol = p = 1,073 g/cm3
p = ms/Vs => ms = pxVs
= 100x1,073 = 107,3 g sol NaCl
md = a = ?g , m.apa = b = ?g
ms = a + b = 107,3 g
c% = mdx100/ms
10 = 100a/107,3
=> a = 10,73 g NaCl
=> b = 107,3 - 10,73 = 96,57 g apa
3.
lichida
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