Question

In a titration 5.0 mL of a 2.0 M NaOH aq solution exactly neutralizes 10.0 of an HCL aq solution what is the concentration of the HCL(aq)solution

Answer 1

The  concentration    of  HCl solution  is  calculated  as  follows

write  the  equation   for  reaction

NaOH  + HCl = NaCl  +  H2O

find  the  moles   NaOH  =  molarity  x volume /1000

=  5  x2/1000  =  0.01  moles

by  use  of mole  ratio  between  NaOh  to HCl  which  is 1 :1  the  the  moles of  Hcl   is  also =  0.01 moles

concentration is therefore =   moles/volume    x1000

=  0.01/10  x1000 = 1M