A 25.00 ml sample of hbr is titrated with a 0.150 m standardized sodium hydroxide solution. the endpoint was reached when 18.80 ml of titrant had been added. calculate the molar concentration of the hbr.

The dilution formula is used to estimate the added or the initial volume and solute. The molar concentration of hydrogen bromide (HBr) at the end point is 0.11 M.

What is dilution?

Dilution is the process of decreasing the amount of the solute concentration by the addition of the solution or water. The final molarity decreases in the dilution.

The reaction between sodium hydroxide solution and hydrogen bromide is given as,

NaOH + HBr → NaBr + H₂O

Here, a mole of sodium hydroxide uses a mole of hydrogen bromide to produce a mole of sodium bromide and water.

Given,

Molar concentration of sodium hydroxide solution = 0.15 M

Volume of NaOH = 18.8 mL

The molar concentration of HBr = M₂

Volume of HBr = 25.0 mL

Using the dilution formula,

M₁V₁ = M₂V₂

0.15 × 18.8 = M₂ (HBr) × 25.0

M₂ (HBr) = 0.11 M

= 0.11 M

Therefore, 0.11 M is the molar concentration of hydrogen bromide at the end point of the titration reaction.

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