Search 79,439 tutors
Ask a question
0 0

gas stoichiometry question

A foul smelling gas produced by the reaction of HCL and Na2S:

2HCl + Na2S --> 2NaCl + H2S

is collected in and a 1.00 L sample was found.  How many moles were found in the sample knowing the reaction took place under STP conditions and how many grams of HCl are produced by the reaction?


I think some information is missing?  I get 3.25 g HCl which isn't an option..


the choices are

a.) 2 g

b.) 0.82 g

c.) 0.32 g

d.) 8 g


Please help me or let me know what is missing!  Thanks!

Tutors, please sign in to answer this question.

2 Answers

You can use dimensional analysis.

You start with what's given:

1.00 L of H2S (1 mol of H2S/22.41 L)(2 mol of HCl/1 mol of H2S)(36.46 g of HCl/1 mol of HCl) = 3.25 g of HCl

I got the same answer as you got.