Question

What is the molarity of HCl found in a titration where 30 mL of HCl is titrated with 15 mL of 0.1 M NaOH

Answer 1

The molarity of HCl is found in a titration where 30 mL of HCl is titrated with 15 mL of 0.1 M NaOH is 0.05 M.

What is molarity?

Molarity is the measure of the concentration of any solute per unit volume of the solution.

The reaction is $\rm NaOH(aq)+HCl(aq) \rightarrow H2O(l)+NaCl(aq)$

The ratio is 1:1

Step1- to calculate the equal moles of HCl

$\dfrac{0.1\;mol\;NaOH}{ L} \times 15\;ml = 1.5\; mmol$

Step2: Calculate the molar concentration

$\dfrac{1.5 \; m mols\;HCl}{ 30\;ml\;HCl} = 0.05 \;M \;HCl$

Thus, the molarity of HCl is 0.05 M.

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