Chimie
belbe
19

1)Ce cantitate de oxid de potasiu reactioneaza cu 177grame acid sulfuric de concentratie 49%.Ce cantitate de solutie de acid sulfuric s-a consumat?

+1
(1) Răspunsuri
rebecuta8

C=md/ms*100=>md=C*ms/100=49*177/100=86,73g H2SO4 K2O + H2SO4 => K2SO4 + H2O 94g K2O.................98g H2SO4 xg K2O..................86,73g H2SO4 x=94*86,73/98=83,19g K2O MK2O=2AK+AO=2*39+16=94g/mol n=m/M=83,19/94= Calculeaza ! MH2SO4=2AH+AS+4AO=2*1+32+4*16=98g/mol

Adaugă răspuns