A 10 mL sample of hydrochloric acid neutralizes 15 mL of a .4M solution of NaOH.?

[killerbird979]

A 10 mL sample of hydrochloric acid neutralizes 15 mL of a .4M solution of NaOH. What is the molarity of the hydrocholoric acid?

 

[JohnHendrixThomas]

Assuming the molecular ratio of the reactants is 1:1, then use C1V1=C1V2
15 x 0.4 = 10 x C2

10 x C2 = 6

6 over 10 = C2

Concentration = 0.6 Moldm^-3