If 25 cm^3 of the potassium hydroxide (KOH) solution was used to neutralise 35cm^3 hydrochloric (HCl)solution,

Question

If 25 cm^3 of the potassium hydroxide (KOH) solution was used to neutralise 35cm^3 hydrochloric (HCl)solution,
 
determine the concentration of the hydrochloric acid solution.

Thanks

DrBob222 · Answer

What's the concn of the KOH? mols HCl = M x L mols KOH = mols HCl M KOH = mols KOH/L KOH used.