Question

10 moles of a mixture HCl and H2SO4 requires 16 moles of NaOH for complete neutralisation. Calculate percent of HCl in the mixture.​

Answer 1

Answer:

As you can see, it takes one mole of hydrochloric acid to neutralize one mole of strong base. This means that a complete neutralization requires equal numbers of moles of the two reactants.

Even without doing any calculations, you can look at the values given to you and try to estimate the concentration of the hydrochloric acid solution relative to that of the sodium hydroxide.

You know that

10 mL

of this hydrochloric acid solution must contain the same number of moles of solute as

15 mL

of sodium hydroxide solution.

Since you have the same number of moles in a smaller volume, it follows that the hydrochloric acid solution will be more concentrated than the sodium hydroxide solution.

Answer 2

As you can see, it takes one mole of hydrochloric acid to neutralize one mole of strong base. This means that a complete neutralization requires equal numbers of moles of the two reactants.

Even without doing any calculations, you can look at the values given to you and try to estimate the concentration of the hydrochloric acid solution relative to that of the sodium hydroxide.

You know that

10 mL

of this hydrochloric acid solution must contain the same number of moles of solute as

15 mL

of sodium hydroxide solution.

Since you have the same number of moles in a smaller volume, it follows that the hydrochloric acid solution will be more concentrated than the sodium hydroxide solution.