>>11396783for every mole of sulfuric acid, you need two moles of sodium hydroxide. Sulfuric acid is a strong acid, sodium hydroxide is a strong base, so they neutralise and you get water and a salt, na2so4. Write out the equation and balance and you end up with that 2:1 mole ratio. As for your last question, I'm not sure what you mean. pH is the most obvious measure, but if you're trying to distinguish between acids of different strengths (or bases), you can measure electrical conductivity (higher in strong bases/acids), rate of evolution of h2 when combined with a metal. Strong acids/bases will (almost) fully ionise in aqueous solution while weak acids/bases will only partially ionise.
