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Calculati cantitatea in moli de hidroxid de sodiu care neutralizeaza total 500g solutie HCl de C (concentratie)=36,5%
Urgent,va rog ajutati-ma!!!


Răspuns :

NaOH+HCl=H2O+NACl
c=md/ms*100
36,5/100=md/500
md=500*36,5/100⇒md=182,5
[tex]M_{HCl}=1+35,5=36,5g/mol[/tex]
[tex]M_{NaOH}=23+16+1=40g/mol[/tex]
Notam sub NaOH necunoscuta x
x=40*182,5/36,5
x=200 g
n=m/M
n=200/40⇒n=5 moli NaOH