How much base to neutralize acid?

[ride5150]

I have a question in my environmental engineering class that goes like this:

if 100mg H₂SO₄ is added to 1 Liter of water, how many milligrams of NaOH (strong base) must be added to neutralize the acid?

the answer is 81.6mg, but how do i get to the answer?

i tried writing a reaction of: H₂SO₄ + NaOH = 2H⁺ + SO^2-₄ + Na⁺ + OH^-

then doing: molarity of H₂SO₄ times Molarity of NaOH = 10^-7

but i just can't seem to find how to get the answer.

any help would be greatly appreciated

 

[Borek]

This is a simple stoichiometry. Start by balancing the reaction equation - so far it even doesn't contain correct products, you just dissociated both substances. Do you know how to read balanced reaction equation?