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reeseleprell4141
03.07.2021 •
Chemistry
If 25.0 mL of a 6.40 M HCl solution is diluted to 2.00 L, what is the molarity of the new solution?
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Ответ:
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Ответ:
0.200g de gas son obtenidos
Explanation:
La reacción de ácido clorhídrico, HCl, con Zn es:
2HCl(aq) + Zn(s) → ZnCl₂(s) + H₂(g)
Donde 2 moles de ácido reaccionan con 1 mol de Zn para producir una mol de cloruro de cinc y una mol de hidrógeno (gas)
Asumiendo que el ácido está en exceso, las moles de 6.5g de Zn (Masa molar: 65.38g/mol) son:
6.5g × (1mol / 65.38g) = 0.0994 moles de Zn
Como 1 mol de Zn produce 1 mol de hidrógeno, las moles de hidrógeno son 0.0994 moles de H₂. En gramos (Masa molar H₂ = 2.01g/mol):
0.0994 moles H₂× (2.01g / mol) = 0.200g de gas son obtenidos