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URGENT! 120g de solutie H2SO4 reactioneaza cu NaOH solutie in concentratie de 30%.Cata solutie de NaOH ne trebuie? Cata H2O vom avea in vas la final?

Răspuns :


120 md
H2SO4 + 2NaOh ---> Na2so4 + 2h2o
98 2 ori 40 2 ori 18


m h2so4= 120g
c naoh= 30%

120 ..................md de naoh
2+32+64=98.........2 ori 40

md = 120 ori 89/98= 97,94 g
30= 48,97/ms ori 100 deci ms de naoh=9794/30=326,46 g solutie de naoh

120.....,.. m de apa= 44,08 g h2o
98.....,....36

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