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Calculate the molarity of an HCl solution if 25.0 mL of the solution is neutralized by 15.5 mL of 0.800 M NaOH. Below is the unbalanced equation: ______ HCl + _____ NaOH →____ H2O + _____ NaCl

Sagot :

Answer:

.496 M .

Explanation:

15.5 mL of .8 M NaOH will contain .0155 x .8 moles of  NaOH

moles of  NaOH = .0124 moles

For neutralization,  moles contained by 25 mL of HCl  = .0124

Hence molarity of HCl = .0124 / .025

= .496 M .

0.496 M is the molarity of an HCl solution if 25.0 mL of the solution is neutralized by 15.5 mL of 0.800 M NaOH.

What is molarity?

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.

Molarity = [tex]\frac{Moles \;solute}{Volume of solution in litre}[/tex]

15.5 mL of 0.8 M NaOH will contain 0.0155 x 0.8 moles of  NaOH

Moles of  NaOH = 0.0124 moles

For neutralization,  moles contained by 25 mL of HCl  = 0.0124

Hence molarity of HCl = [tex]\frac{0.0124}{0.025}[/tex]

= 0.496 M .

Hence,  0.496 M is the molarity of an HCl solution if 25.0 mL of the solution is neutralized by 15.5 mL of 0.800 M NaOH.

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