[Rhydos]

What is the concentration of acetic acid in vinegar when 32.5 ml of 0.56M Ca(OH)₂ are required to neutralize 15 ml of the vinegar?

How would I go about solving this?  What steps would I have to use?

[Jorriss]

If it's a neutralization reaction, we know moles of base = moles of acid at the end right? And is there any way to solve for either moles of acid or moles of base?

[Borek]

http://www.titrations.info/titration-calculation

[Schrödinger]

If it's a neutralization reaction, we know moles of base = moles of acid at the end right?

I don't think that's correct.

It is always true that equivalents of acid = equivalents of base. Moles can be equated only if the acidity of the base and the basicity of the acid are the same. examples : NaOH and HCl, Ca(OH)₂ and H₂SO₄,etc

[Reckoner]

Find the number of moles of base.

How many moles of OH- are in 1 mole of Ca(OH)2? How many moles of H+ in 1 mole of ethanoic acid? Neutralisation is when the moles of H+ = moles of OH-. Hence you can find the number of moles of acid, and then the concentration in vinegar.

[aeacfm]

i think that the determination  must be in moles not in equivalents

[Borek]

i think that the determination  must be in moles not in equivalents

Determination must be in moles, but they react in equivalents - so you have to account for the difference.

[aeacfm]

good catch thank you