Answer to Question #182042 in General Chemistry for Kyra Stephenson

Question

if you want to put 60.0L of Hydrogen gas at SATP into a bottle by reacting excess aluminium metal with sodium hydroxide solution, what mass of NaOH is required?

Answer 1

2NaOH +2AL + 2H₂O =2NaALO₂+3H₂

1 Mole of hydrogen gas at STP=22.4L

60L=(60/22.4)=2.679

The mole ratio of NaOH:H₂=2:3

2:3=1.786:2.679

The mass of NaOH required=1.786x40=71.44 grams