The percent by mass of calcium hydroxide in the solution : 15.41%
The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.
Mass of solute (Ca(OH₂-Calcium hydroxide) : 28.5
Mass of solution = 185 g
[tex]\tt \%mass=\dfrac{mass~solute}{mass~solution}\times 100\%\\\\\%mass=\dfrac{28.5~g}{185~g}\times 100\%\\\\\%mass=15.41\%[/tex]
15.41% is the percent by mass of calcium hydroxide (CaOH) in the solution.
Percent mass of any solute in the solution will be define as:
% mass = (mass of solute / mass of solution) × 100%
In the question given that,
Mass of solute calcium hydroxide (CaOH) = 28.5 g
Mass of solution i.e. water = 185 g
Noe we put these values on the above equation to calculate the % mass of CaOH in the solution as:
% mass = (28.5/185) × 100% = 15.41%
Hence, the percent mass of CaOH is 15.41%.
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