Question

calculati cantitatea de NaOh care reactioneaza cu 100 g solutie HCl de contraeie 20%
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Answer 1

NaOH +HCl = NaCl + H2O

C=md x 100/ms  => md HCl= c x ms/100=20 x100/100= 20g HCl

1 mol NaOH----------1 molHCl

x---------------------------20/36.5

x=0.5479 moli NaOH

m = n xM= 0.5479x 40=21.916 g NaOH