Given a balanced chemical equation between H2SO4(aq) and KOH(aq) H2SO4(aq) + 2 KOH(aq) → K2SO4(aq) + 2 H2O(l) What volume (in mL) of 0.33 M H2SO4(aq) solution is necessary to completely react with 110 mL of 0.76 M KOH(aq)?
Note: (1) The unit of volume of H2SO4(aq) is in mL (2) Insert only the numerical value of your answer (do not include the units or chemical in your answer).
The balanced chemical equation for the reaction is given as
H2SO4 (aq) + 2 KOH (aq) ----------> K2SO4 (aq) + 2 H2O (l)
As per the balanced stoichiometric equation,
1 mole H2SO4 = 2 moles KOH.
Millimol(s) KOH added = (110 mL)*(0.76 M) = 83.6 mmol.
Millimol(s) H2SO4 required to titrate 83.6 mmol KOH = (83.6 mmol KOH)*(1 mole H2SO4)/(2 moles KOH) = 41.8 mmol H2SO4.
Volume of 0.33 M H2SO4 corresponding to 41.8 mmol H2SO4 = (41.8 mmol H2SO4)/(0.33 M)
= 126.667 mL
≈ 126.67 mL (ans, correct to 2 decimal places).
The number of mL of 0.33 M H2SO4 required = 126.67
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