Respuesta :
Answer:
% = 11.11%
Explanation:
To get the %m/m of any solution we should use the following expression:
%m/m = m solute / m solution * 100
we have the mass of solute, but not the mass of solution, however this can be calculated. solution is made using solute and solvent so:
m solution = 25 + 200 = 225 g
Now that we have the mass of solution, we can calculate the %:
%m/m = 25 / 225 * 100
%m/m = 11.11%
This is the %m/m of this solution
The percent by mass of [tex]\rm KNO_3[/tex] in the solution has been 11.11 %.
Percent by mass has been the representation of the concentration of the mass of compound in the total solution mass.
The percent by mass of a compound in a solution has been given by:
[tex]\rm Percent\;by\;mass=\dfrac{mass\;of\;compound}{mass\;of\;solution}\;\times\;100[/tex]
Numerical set up for Percent by Mass:
The given solution has mass of [tex]\rm KNO_3[/tex] has been 25 grams.
The mass of solution has been the sum of the mass of water and the solute. The mass of water has been, 200 grams.
The mass of solution has been given as:
[tex]\rm Mass\;solution=Mass\;KNO_3\;+\;Mass\;H_2O\\Mass\;solution=25 \;+\;200\;g\\Mass\;solution=225\;g[/tex]
The mass of solution has been 225 g.
The percent mass of [tex]\rm KNO_3[/tex] has been:
[tex]\rm Percent\;mass=\dfrac{25}{225}\;\times\;100\\Percent\;mass=11.11\;\%[/tex]
The percent by mass of [tex]\rm KNO_3[/tex] in the solution has been 11.11 %.
For more information about percent by mass, refer to the link:
https://brainly.com/question/14990953
