Activity 3. Solve the following:

1. What mass of solid Lanthanum (III) oxalate nonahydrate { La2 ( C2O4 )3 ∙ 9 H2O } can be obtained from 650 mL of 0.0170 M aqueous solution of LaCl3 by adding a stoichiometric amount of sodium oxalate ?

2. Calculate the mass of hydrogen formed when 25 grams of aluminum reacts with excess hydrochloric acid.
2Al + 6HCl → Al2Cl6 + 3H2

3. What mass of ZnCl2 can be prepared from the reaction of 3.27 grams of zinc with 3.30 grams of HCl?
Zn +2HCl → ZnCl2 + H2

4. How many milliliters of 0.200 M NH2OH are needed to react with 12.0 mL of 0.550 M FeCl3?
FeCl3 + 3NH4OH Fe(OH)3 + 3NH4Cl

 

Aluminum reacts with hydrochloric acid to produce aluminum chloride and hydrogen gas. What mass of hydrochloric acid reacts when 87.7 grams of aluminum dissolves?

The equation is: 2Al + 6HCl → 2AlCl₃ + 3H₂

Aluminum reacts with hydrochloric acid to produce aluminum chloride and hydrogen gas:

2 Al(s) + 6 HCl(aq) -> 2 AlCl₃(aq) + 3 H₂(g)

What mass of H₂(g) is prodced from the reaction of 1.5 g Al(s) with excess hydrochloric acid?

1. Aluminum reacts with excess hydrochloric acid to form aqueous aluminum chloride and 156 ml of hydrogen gas over water at 26°C and 0.956 atm. (Vapor pressure of water at 26ºC = 25.2 mmHg.) How many grams of aluminum reacted? Enter to 3 decimal places.