This is basic chemistry ,

Here you can find how to differentiate between both:

http://www.dummies.com/education/science/chemistry/how-to-measure-concentration-using-molarity-and-percent-solution/

Regards

Percentage of solution means the percentage of solute(present in smaller amount) to the total weight of solution.It is considered when volume of solution is not fixed and we deal with the wt/wt calculations.

Molarity is related with the number of moles of solute present in unit volume of the solution.It is affected by temperature and storage because volume is temperature dependent.Number of moles of solute are the ratio of given mass of solute and molar mass of the solute.

Percent solutions is a simple unit used in chemistry to indicate content of solute in basis to a 100 % of solution. Relations could be in volume (%V/V, ml of solute/100 ml of solution), mass or weigth (%m/m, g of solute/100 g of solution) or both (%m/V, g of solute/100 ml of solution).

The mole per litre is an unit more appropiate in chemistry, especially, for estequiometric calculations (volumetry).

The difference between a percent solution and a molar solution lies in the way the concentration of a solute in a solution is expressed: 1. **Percent Solution**: This refers to the concentration of a solution expressed as a percentage. It can be in terms of weight per volume (w/v), weight per weight (w/w), or volume per volume (v/v). For example, a 10% w/v solution means 10 grams of solute are dissolved in 100 milliliters of solution. This method is straightforward but does not account for the molecular weight of the solute or the temperature, which can affect the solution's volume. 2. **Molar Solution**: This describes a solution's concentration in terms of moles of solute per liter of solution (mol/L). A mole is a unit that represents a specific number of particles (6.022 x 10^23). Therefore, a 1 Molar (1 M) solution contains one mole of solute dissolved in one liter of solution. Molar concentration is more specific because it considers the molecular weight of the solute and is independent of temperature. In summary, percent solutions are more general and can be used for various solutes and solvents, but they are less precise than molar solutions. Molar solutions provide a more accurate measure of concentration, especially in chemical reactions where the number of reacting particles is crucial.

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