Write & balance the equations for the reaction of the following active metals wi

Question

Write & balance the equations for the reaction of the following active metals with hydrochloric acid: sodium, aluminum, zinc, calcium If 0.04250 g of magnesium is reacted with an excess of hydrochloric acid, calculate the theoretical volume at STP of hydrogen gas produced. If 44.00 mL of hydrogen is actually collected OVER WATER from the above reaction conducted at 22.0 degree C and 759.2 torr. Calculate the volume of dry hydrogen produced at STP. Calculate the percentage error of this experiment. Explain the reason for each of the following procedures in this experiment: a) Cleaning the magnesium strip with sandpaper b) Equalizing the water levels inside and outside the eudiometer

Explanation / Answer

1)

2Na + HCl -----------> 2NaCl + H2

2Al + 6HCl -----------> 2AlCl3 + 3H2

Zn + 2HCl --------------> ZnCl2 + H2

Ca + 2HCl ------------> CaCl2 + H2

2) Mg + 2HCl -----------> MgCl2 + H2

24.305 g Mg gives 222.4L H2

0.0425 g Mg gives 0.0425 x 22.4 / 24.305 = 0.0392

volume of H2 formed = 0.0392 L

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