Mass Percent Formula

Mass Percent Formula

Mass percent is a way of describing a concentration or expressing the component in a particular mixture. It is possible to describe the composition of a solution in terms of mass percentages, which indicate how much solute is present in a given mass of solution. A solute’s quantity is expressed in mass or by moles. The mass percent of a solution is calculated by multiplying the grammes of solute per gramme of solution by 100.

As well as solving for the molar mass, this formula also solves for the mass of each element in one mole. Students can determine the mass percentage of each element with these masses.

Mass Percent Formula = Mass of Solute/Mass of Solution x 100%

Mass percent is the way to express concentration. In addition, it describes the components of a particular mixture. Mass percentages can be used to understand the solution composition. A mass of solute is shown in a given mass of solution. Mass or moles are used to express the quantity of solute. A mass percent can be used to express a degree. In addition, it describes the components involved in a particular mixture. Mass percentages are commonly used to describe solution composition. It indicates the amount of solute present in a given amount of solution.

Mass Percent Formula = (component’s mass ÷ total mass) x 100%


Mass Percent Formula = (mass of solute÷ mass of solution) x 100%

The Mass Percent Formula solves for the molar mass and the mass of every element in 1 mole of a compound. Each element’s mass percentage will be determined using these masses. A solution’s mass percent is calculated by dividing the grammes of solute by the grammes of solution, then multiplying by 100. The mass of a component or solute is usually expressed in grams, but any unit of measurement can be used as long as it is an equivalent unit for both the component and solution masses. Additionally, mass percent can be referred to as weight percent, or w/w%.

Steps for Finding the Mass Percentage

  • The first step is to define the equation for the mass percent of a compound. A compound’s mass percent is calculated using the following formula: Mass Percent Formula = (mass of chemical÷total mass of compound) x 100. Students can multiply by 100 at the top to specify the value as a percentage.
  • The second step is to calculate the entire mass of the compound. After students calculate the masses of all the elements or compounds being added together, they simply have to add them up to calculate the mass of the ultimate compound or solution. This could be the denominator in the mass percent calculation. For a better understanding of the concepts of the Mass Percent Formula, students can subscribe to the Extramarks website.
  • The third step is to determine the mass of the chemical. By seeking out the mass percent, you are attempting to determine the mass of a specific chemical (the chemical-in-question) as a percentage of the entire mass of all elements. The next step is to determine the mass of the chemical in question. Within the mass percent calculation, this mass is the numerator. Students can refer to the Extramarks website for a better understanding of the Mass Percent Formula.
  • The variables are entered into the mass percent equation in step 4. So once students have determined the values for every variable, plug them into the equation.
  • The fifth step is to calculate the mass percent. Now that the equation is filled in, it is simply a matter of solving for the mass percent. The chemical’s mass should be divided by the compound’s total mass and multiplied by 100. This may offer students the mass percent of the chemical.

Solved Examples for Mass Percent Formula

Example 1

An aqueous solution of sodium chloride is prepared. Calculate the mass of a 5% (m/m) calcium chloride solution that can be prepared from 100 g of calcium chloride.


Mass/mass per cent indicates that 5g of CaCl2 is used to prepare 100 g of solution. For a better understanding of the solution, students can subscribe to the Extramarks website.

Example 2

Calculate how many grammes of sugar is present in 1.500g of 1.50% solution of sugar in water.


In 100 g of solution, the mass percentage gives the mass of sugar.

As a result, we can solve the two conversion factors as follows:

1.50g sugar / 100g solution are inverted to 100g solution / 1.50g sugar

the given solution,

G sugar = (1.500g solution x 1.5g solution) / 100g solution

G sugar = 22.5g sugar

Hence, 22.5g sugar is present in 1.500 g of a 1.50% solution.

For a better understanding of the Mass Percent Formula students can subscribe to the Extramarks website.

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