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Activity 3: PERCENT BY MASS
Percent by mass express the concentration of a solution in terms of the mass of solute in grams to the mass of the solution. For example, a salt solution of 10% concentration means that for every 100 grams of the solution it contains 10 grams of salt and 90 grams of water.
Percent by mass can be computed using the equation:
%mass = mass of solute ======================== Mass of solution X 100 %
Directions: Study the given problems and solved what is being asked for.
A solution contains 5 grams of salt and 195 grams of water. How many grams of solution are present? What is the present by mass concentration of the solution ?
Given:
What is asked:
Equation or Formula :
Solutions:
A sugar solution has a mass of 500 grams. The solution contains 200 grams of sugar. How many grams of water is used in the solution? What is the percent by mass concentration of the solution?
Given:
What is asked:
Formula
Solutions:
Sodium acetate is a compound that readily dissolves in water. How much sodium acetate should you used in 135 grams of water to produce a 25% solution?
Given :
What is asked or Unknown :
Formula:
Solutions:
Help pls :(
Sagot :
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