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H+ = 2 x 10^-3
H2SO4 ⇒ 2H+ + SO4-2
10^-3 2x10^-3 10^-3
Ca(OH)2 + H2SO4 ⇒ CaSO4 + H2O
m 2,7 20x - -
r 2,7 2,7 2,7 2,7 -
s - 20x - 2,7
M = (20x-27)/50 ⇔ 10^-3 = (20x-2,7)/50
⇔ 5x10^-2 = 20x - 2,7
⇔ 2,75/20 = x
x= 0,1375 M
M=gr/mr 1000/v
0,1375 = gr/98 1000/100
gr = 1,3475 gram