In this lesson our instructor talks about solution, acids, and bases. First, she discusses solutions, dissolving, and increasing the rate of dissolving. Then she talks about solubility, concentration and the pH scale. Lastly, she lectures on acids and bases. Four complete example videos round up this lesson.
A solution is a homogeneous
mixture where the components of the mixture are evenly mixed.
In a solution, one substance,
the solute is dissolved into another substance, the solvent.
The movement of molecules
causes the solute to break apart and mix evenly throughout the
Liquids and gases dissolve
easily. Solid alloy solutions must be melted for dissolving to
A liquid dissolves a solid at
the surface of the solid.
Since water is a polar
molecule, it works well as a solvent. A solution where water is the
solvent is called an aqueous solution.
Agitation, size of particles
and temperature can affect the rate of dissolving.
Solubility is the maximum
amount of solute that can be dissolved in a certain amount of
Solubility is affected by the
types of solutes and solvents, temperature, and pressure.
The amount of solute dissolved
into the solvent is the concentration of the solution.
The pH scale is the measure of
H+ in a solution. The scale ranges from 0 to 14; a pH less than 7 is
an acid, 7 is neutral, and greater than 7 is a base.
Acids and bases react together to
form salt and water
When naming ionic compounds, the name of which ion goes first?
The positive ion is first
What is the name of the ionic compound that forms when Hydrogen (with an oxidation number of 1+) and Chlorine (with an oxidation number of 1-) bond?
What is the chemical formula of Magnesium Bromide? (Mg2+ and Br1−)
What is the name of an ion that is made up of more than one atom?
A polyatomic ion
What is the chemical formula for Magnesium Hydroxide (Mg2+ and OH1−)?
What type of compound is diarsenic pentoxide? How do you know?
A covalent compound – this is a bond between a metalloid and a nonmetal so it is covalent and the numerical prefixes are included in the names, which is another indication that it is a covalent compound.
What type of compound is copper (II) carbonate? How do you know?
An ionic compound – Copper is a metal and carbon is a nonmetal, copper (II) has an oxidation number of 2+ and carbonate is a polyatomic ion with an oxidation number of 2-
What is the chemical formula for phosphorus trihydride?
What type of compounds are solids at room temperature and form when electrons are gained or lost?
What is the name for a compound that is made up of only two elements?
*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.
Solutions, Acids, and Bases
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.