4.5: Stoichiometry of Mg(s) and HCl(aq)
Chapter 4
University of Arkansas Little Rock
Mariam R. Shaikh, Xiaomin Tu, Dr. Robert Belford



Mg(s) + 2HCl(aq) --> MgCl2(aq) + H2(g)


Question 1
If 1.0 mol of Mg reacts with 3.0 mol of HCl, how many moles of gas will be produced?
(A)  0.5mol
(B)  1.0mol
(C)  2.0mol
(D)  3.0mol
 
Hint

Your response
Not answered yet

Question 2
How many moles of gas will be produced from 2.43g of Mg?
(A)  0.05mol
(B)  0.08mol
(C)  0.1mol
(D)  2.0mol
 
Hint

Your response
Not answered yet

Question 3
How many grams of gas will be formed if 0.243g of Mg is dissolved completely in the HCl solution?
(A)  0.020g
(B)  0.030g
(C)  0.050g
(D)  0.080g
 
Hint

Your response
Not answered yet

Question 4
How many moles of gas will be formed if it takes 20.0ml of 0.1M HCl to dissolve all the Mg?
(A)  0.1mol
(B)  0.01mol
(C)  0.002mol
(D)  0.001mol
 
Hint

Your response
Not answered yet

Question 5
What is the volume of the gas at STP if 20.0ml of 0.1M HCl is used to dissolve all the Mg? (note, you need to cover gas laws before you can answer this).
(A)  2.24L
(B)  0.224L
(C)  0.0224L
(D)  0.0448L
 
Hint

Your response
Not answered yet