Question

A 3-M solution of vinegar (acetic acid and water) and a 3-M solution of salt water are both prepared. Which has the greater molarity?

Salt water and vinegar have equal molarities.

Salt water will have the greater molarity because its molar mass is higher.

Vinegar will have the greater molarity because its molar mass is higher.

It is impossible to determine with the information given.

Answer 1

The correct answer is :'Salt water and vinegar have equal molarities.'.

Step-by-step explanation:

Molarity of the solution is defined as moles of compound present in the 1 liter volume of the solution.

`Molarity=\frac{\text{Moles of solute}}{\text{volume of solution in L}}`

We are given with 3 Molar solution of vinegar which means that 3 moles of acetic acid are present in 1 Liter solution of vinegar.

Also salt solution with 3 Molar concentration means that 3 moles of salt are o present in 1 Liter salt solution.

Molarity of acetic acid = Molarity of salt solution = 3 M