Stoichiometry/Fraction label method

[Pravs]

I have trouble solving this problem. Can anyone help me out?

 

2NaOH + H2SO4 gives Na2SO4 + H2O

 

What is the volume of a 0.750M of H2SO4 solution is needed to react completely with 15.0gms of NaOH?

Ans is 0.251L.

 

 

Thank you.

[Izzy_Bee]

n = M/Mr

n = number of moles

M= mass of reactant or product

Mr = relative atomic mass

 

You have the figures just put them in the formula.

[Cap'n Refsmmat]

First step, of course, is to find the number of moles of NaOH you're talking about there. When you're dealing with chemical reactions, work in moles.

 

Make sure the chemical equation is balanced, then use the coefficients to tell you the ratios between reactants. You know, the one with the 2 in front takes twice as many moles, etc.

 

Then use the definition of molarity.

 

Show me where you get stuck if you can't work it out.