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Sagot :
BaO₂ + H₂SO₄ ⇒ BaSO₄ + H₂O₂
169g : 98g
23.1g : mx
mx = [23.1*98g]/169g ≈ 13.4g
Mr = 98g/mol
n = 13.4g/98g/mol ≈ 0.14mol
Cm = 4.5M
n = 0.14mol
V = 0.14mol/4.5mol/dm³ ≈ 0.031L = 31mL
169g : 98g
23.1g : mx
mx = [23.1*98g]/169g ≈ 13.4g
Mr = 98g/mol
n = 13.4g/98g/mol ≈ 0.14mol
Cm = 4.5M
n = 0.14mol
V = 0.14mol/4.5mol/dm³ ≈ 0.031L = 31mL
Answer:
31.43 ml of sulfuric acid is needed to react with 23.1 g of barium peroxide.
Explanation:
For the reaction:
BaO₂(s) + H₂SO₄(aq) ⇒ BaSO₄(s) + H₂O₂(aq)
We need 1 mole of BaO₂ to react with 1 mole of H₂SO₄ and then forming 1 mole of BaSO₄ and 1 mole of H₂O₂.
We know that 4.5 M solution of H₂SO₄ means 4.5 moles of H₂SO₄ in 1000 ml of solution.
Then,
23.1 g BaO₂ × [tex]\frac{1 mole_{BaO_2}}{163.33g_{BaO_2}}[/tex] × [tex]\frac{1 mole_{H_{2}SO_{4}}}{1mole_{BaO_2}}[/tex] × [tex]\frac{1000ml}{4.5 mole_{H_{2}SO_{4}}}[/tex] = 31.43 ml H₂SO₄
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