Arkansas State University
Department of Chemistry
and Physics
Answers
Stoichiometry (using solutions)

 
 

1. Given the following reaction:  (hint: balance the equation first)

 H2SO4       +   2 NaOH   g      Na2SO4      +  2 H2O

If 43.2 mL of 0.236 M NaOH reacts with 36.7 mL of H2SO4, what is the concentration of the H2SO4 solution?    0.139 M H2SO4


2. Given the following equation:

  NaOH   +   HCl  g   H2O    +   NaCl

If 36.7 mL of HCl solution is needed to react with 43.2 mL of a 0.236 M NaOH, what is the concentration of the HCl solution?   0.278 M HCl


3. Given the following equation:

Al(OH)3    +  3 HCl    g     AlCl3    +   3 H2O

How many mL of 1.2 M HCl is needed to dissolve 5.8 g of Al(OH)3? 186 mL of 1.2 M HCl


4. Given the following equation:
H2SO4       +    Na2CO3    g    Na2SO4      +     H2O   +    CO2
Calculate the molarity of the H2SO4 solution if it takes 40.0 mL of H2SO4 to neutralize 0.364 g of Na2CO3.     0.0859 M H2SO4