Activity - Solve Me!
Directions. Analyze and solve the following problems Fill in the given in each item Show your
solution
What is the percent concentration of a solution that is prepared by mixing 30 ml acetic acid
and 120 ml water?
Given. Volume solute
Volume solvent.
Volume solution
Asked:
Solution
2. What is the percent concentration of a 500 ml solution that contains 50 ml isopropy!
alcohol?
Given Volume solute:
Volume solution:
Asked:
Solution:
How many milliliters of sulfuric acid is present in a 300 ml bottle which is labeled 15%
concentration?
Given: Percent by volume concentration (% VIV).
Volume solution
Asked:
Solution:
Answers
By the end of this section, you will be able to:
Describe the fundamental properties of solutions
Calculate solution concentrations using molarity
Perform dilution calculations using the dilution equation
In preceding sections, we focused on the composition of substances: samples of matter that contain only one type of element or compound. However, mixtures—samples of matter containing two or more substances physically combined—are more commonly encountered in nature than are pure substances. Similar to a pure substance, the relative composition of a mixture plays an important role in determining its properties. The relative amount of oxygen in a planet’s atmosphere determines its ability to sustain aerobic life. The relative amounts of iron, carbon, nickel, and other elements in steel (a mixture known as an “alloy”) determine its physical strength and resistance to corrosion. The relative amount of the active ingredient in a medicine determines its effectiveness in achieving the desired pharmacological effect. The relative amount of sugar in a beverage determines its sweetness (see Figure 1). In this section, we will describe one of the most common ways in which the relative compositions of mixtures may be quantified.