Answer to Question #184504 in General Chemistry for Shapaka Nikodemus

Question

 If 15.65 mL of aq. HCl is required to neutralise 20.00 mL of the sodium carbonate 

solution from question 4 above, what is the molarity of the aq. HCl? (Show all steps in 

your calculation as set out below.)

(a). Write the reaction equation for the titration.

(b). Calculate the number of moles of Na2CO3 (standard solution) used in the titration.

(c). Using the balanced reaction equation, find the number of moles of HCl that 

reacted.

(d). Calculate the molarity of the HCl solution.

Answer 1

a) Na2CO3 + 2 HCl → 2 NaCl + H2CO3

b) 2.43moles Na2CO3

c)Moles of HCl =4.78moles