Aqueous sulfurous acid (H2SO3) was made by dissolving .200L of sulfur dioxide gas at 19 degrees C and 745 mmHg in water to yield 500mL of solution. the acid solution required 12mL of sodium hydroxide solution to reach the titration end point. what was the molarity of the sodium hydroxide solution?

Question

Aqueous sulfurous acid (H2SO3) was made by dissolving .200L of sulfur dioxide gas at 19 degrees C and 745 mmHg in water to yield 500mL of solution.  the acid solution required 12mL of sodium hydroxide solution to reach the titration end point.  what was the molarity of the sodium hydroxide solution?

DrBob222 · Answer

I wonder WHICH titration end point was reached. 2NaOH + H2SO3 ==> Na2SO3 + 2H2O moles NaOH = M x L = ?? Use the coefficients in the balanced equation to convert moles NaOH to moles H2SO3. M = moles/L.