Answer :
40 ml of the NaOH is required to reach the equivalence point, if you start with 1 m NaOH and 40 ml of 1 m acetic acid.
What is molarity?
The molarity of a substance refers to how much of it is present in a given volume of solution (M). Molarity is the measure of the amount of solute per liter of solution. Molarity is also referred to as a solution's molar concentration.
Let the volume of NaOH is V ml.
molarity of NaOH (M₁) is 1 m.
Moles of NaOH(n₁) = molarity × volume
n₁ = 1 × V
n₁ = V mmol
Molarity of CH₃COOH (acetic acid) is 1M
Volume of CH₃COOH is 40ml.
moles of CH₃COOH = 40 × 1
moles of CH₃COOH = 40 mmol
Reaction:
NaOH (aq) + CH₃COOH(aq) → CH₃COO⁻Na⁺(s) + H₂O
At equivalent point:
moles of acid = moles of base
moles of CH₃COOH = moles of NaOH
40 mml = V mml
∴ V= 40 ml
NaOH required is 40 ml.
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