what volume of .5 m sulfuric acid is needed to react completely with 10 mL of 2m potassium hydroxide

Answer 1

Write and balance the equation.
moles KOH = M x L.
Use the equation and coefficients to convert moles KOH to moles H2SO4.
Now use M = moles/L to calculate L H2SO4.

Answer 2

in which compound does sulfur have an oxidation number of -2

1. SO2
2. SO3
3. Na2S
4. Na2SO4