Please help me begin to solve this problem.
A 25.0 mL sample of unknown hydrochloric acid solution is titrated with 0.100M NaOH. The equivalence point was reached after the addition of 23.5 mL NaOH. Find the concentration of the unknown HCl.

I started by writing out the balanced equation:
HCl+NaOH-- NaCl + H2O.

Question

Please help me begin to solve this problem. 
A 25.0 mL sample of unknown hydrochloric acid solution is titrated with 0.100M NaOH. The equivalence point was reached after the addition of 23.5 mL NaOH. Find the concentration of the unknown HCl.

I started by writing out the balanced equation:
HCl+NaOH--> NaCl + H2O.

somy · Answer

Right you can do it like this 
you are given volume and concentration of NaOH 
so u can find mole 
conc= mole/ volume 
mole= conc * volume 
once you get the mole 
u look at the reaction 
as u can see 
ratio between NaOH and HCl is 1:1 thus mole of HCl will be same as NaOH mole 
conc= mole/ volume 
so that means u have mole and you are given volume of HCl in the question 
so find concentration

anonymous · Answer

Thank you!! We haven't gone over this in class so I'm trying to figure out how to start. That helped a bunch!

somy · Answer

you are welcome :)))