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Commercial concentrated sulphuric acid contains 95% H₂SO₄ by mass. If its density is 1.834 g cm⁻³, what is the molarity of the solution?

1. 17.8 M
2. 12.0 M
3. 10.5 M
4. 15.7 M

Correct answer: 17.8 M

Solution

The correct option is right because the molarity is determined by the concentration of the solute in the solution, which is calculated using the density and mass percentage of the acid, leading to a result of 17.8 M.

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