What volume of 0.108 mol L-1 NaOH solution is needed to just completely neutralize a 0.459 mol L-1 solution of CH3COOH with volume 15.1 mL?
The answer should be expressed in mL.
1 mole CH3COOH dissociates to give 1 mole of CH3COO- and 1 mole of H+ to neutralize 1 mole of CH3COOH 1 mole of NaOH is required because NaOH dissociates to give 1 mole of Na+ and OH-, so 1 mole of NaOH is required to neutralize 1 mole of CH3COOH
here
concnetration of CH3COOH is 0.459 mol/ L in 1 L there are 0.459 moles of CH3COOH, that is in 1000 mL there are 0.459 moles of CH3COOH
so number of moles present in 1 mL= 0.459 / 1000
so number of moles present in 15.1 mL= 15.1*0.459/1000
= 0.0069309 moles
so we need 0.0069309 moles of NaOH, concentration of NaOH solution is 0.108 mol/L,
there are 0.108 moles in 1 L that is in 1000 mL
so number of moles in 1 mL= 0.108/1000
= 0.000108 moles
so volume of NaOH required to neutralize CH3COOH= number of moles of CH3COOH present in 15.1 mL/ number of moles present in 1 mL of NaOH
= 0.0069309 moles/ 0.000108 moles
=64.175 mL
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