Question

Bantu jawab no 1 dan 3 dong teman pliss besok dikumpul dan aku bingunggg

Answer 1

Verified answer

1.
2 Fe + 3 H2SO4 ------> Fe2(SO4)3 + 3 H2

Fe: 16.8/56 = 0.3 mol
H2SO4: 300 x 1 = 300 mmol = 0.3 mol

H2SO4 habis bereaksi sebesar 0.3 mol

H2 yg dihasilkan sebesar 0.3 mol (sebanding dgn koefisien reaksinya antara H2SO4 dan H2)

Vol. gas H2: 0.3 x 22.4 = 6.72 L



3.
2 NaOH + H2SO4 ------> Na2SO4 + 2 H2O

NaOH: 100 x 0.3 = 30 mmol
H2SO4: 200 x 0.1 = 20 mmol

2 mol NaOH ~ 1 mol H2SO4 ~ 1 mol Na2SO4
30 mmol NaOH ~ 15 mmol H2SO4 ~ 30mmol Na2SO4

[Na2SO4]: 30 mmol dlm 300 mL
= 0.01 M


yg tersisa H2SO4 sebesar 5 mmol dlm 300 mL

jadi [H2SO4] = 1/60 M