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ce masa de magneziu se consuma in reactia cu 49g solutie acid sulfuric de concentratie 20%??? va rog

Răspuns :

msol = 49g

c = 20%

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MH2SO4 = 98

MMg = 24

c=md*100/ms => md = c*ms/100 = 20*49/100 = 9,8g H2SO4

x.............9,8g

Mg + H2SO4 => MgSO4 + H2

24g.......98g

x=24*9,8/98=2,4g Mg