Answer to Question #106967 in General Chemistry for adaadad

Question #106967
Calculate the mass of hydrogen formed when 25 grams of aluminum reacts with excess hydrochloric acid.

2Al + 6HCl → Al2Cl6 + 3H2
1
Expert's answer
2020-03-30T10:51:12-0400

According to the condition, hydrochloric acid is contained in excess in the reaction mixture. Thus, the amount of hydrogen substance should be calculated using the amount of aluminium substance:

  • ν(Al)=m/Mν(Al) = m/M = 25(g) / 26.98 (g/mol) = 0.93 mol
  • ν (H2) = ν(Al)3/2ν (Al) ∙ 3/2 = 0.93 (mol) ∙ 3/2 = 1.40 mol
  • m(H2) = νMν∙M = 1.40 ∙ 2.00 = 2.80 g

Answer: m(H2)=2.80 g

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be the first!

Leave a comment