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The volume of 0.2M HCl used to reach the equivalence point that was titrated with a 0.1M NaOH solution (based on titration formula) is 10mL.
What is titration?
Titration, also known as titrimetry, is a common laboratory method of quantitative chemical analysis that is used to determine the unknown concentration of an identified analyte. Since volume measurements play a key role in titration, it is also known as volumetric analysis.
How to calculate the volume of HCl?
Using the titration formula
Base = Acid
M₁ * V₁ = M₂ * V₂
Given from the question
M₁ (Molarity of NaOH) = 0.1M
V₁ (Volume of NaOH) = 20mL
M₂ (Molarity of HCl) = 0.2M
V₂ (Volume of HCl) = unknown
M₁ * V₁ = M₂ * V₂
0.1 * 20 = 0.2 * V₂
V₂ = 2 / 0.2
V₂ = 10mL
Therefore, the volume of HCl to reach the equivalence point is 10mL.
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