Choose the expression that gives the molar concentration of a H₂SO₄(aq)solution if 24.3 mL of a 0.105 M NaOH(aq)solution is required to titrate 60 mL of the acid. A)(60 × 24.3)/0.105 B)(60 × 2)/(24.3 × 0.105) C)(24.3 × 0.105)/(60) D)(24.3 × 0.105)/(60 × 2) E)(60 × 0.105)/(2 × 24.3)

Question

Quizplus · Accepted Answer

The balanced chemical equation for the reaction between H₂SO₄(aq) and NaOH(aq) is: H₂SO₄(aq) + NaOH(aq) → Na₄(aq) + H2O(l) From the equation, we can see that 1 mole of H₂SO₄ reacts with 1 mole of NaOH. Therefore, the number of moles of NaOH used to titrate the acid is: moles of NaOH = volume of NaOH (in L) × molarity of NaOH moles of NaOH = 24.3 mL × (1 L/1000 mL) × 0.105 mol/L moles of NaOH = 0.002556 mol The molar concentration of the acid can be calculated using the formula: molarity of acid = moles of NaOH / volume of acid (in L) molarity of acid = (0.002556 mol) / (60 mL × (1 L/1000 mL)) molarity of acid = 0.0426 M The answer is therefore (D) (24.3 × 0.105)/(60 × 2).

Choose the Expression That Gives the Molar Concentration of a H2SO4(aq)solution

Choose the Expression That Gives the Molar Concentration of a H₂SO₄(aq)solution