Question

Обчисліть масову частку розчиненої речовини в розчині одержаному розчиненням 15 г солі в 100г

Answer 1

M(в-ва) = 15 (г)
m(р-ра) = 15+100=115 (г)

W= m(в-ва) / m(р-ра) *100% = 15/115*100% =13%

Answer 2

Calculating the Mass Fraction of the Solute in the Solution

To calculate the mass fraction of the solute in the solution obtained by dissolving 15g of salt in 100g of water, we can use the formula:

Mass Fraction = (Mass of Solute / Total Mass of Solution) × 100%

Substituting the given values: Mass of Solute = 15g Total Mass of Solution = 15g (solute) + 100g (water) = 115g

Using the formula: Mass Fraction = (15g / 115g) × 100%

Calculation

Mass Fraction = (15 / 115) × 100%

Mass Fraction = 13.04%

Therefore, the mass fraction of the solute (salt) in the solution obtained by dissolving 15g of salt in 100g of water is 13.04%.