Before class on Feb. 17
- Watch the two videos below (15 min. and 18 min.)
- Complete the notes
- Make a comment.
The learning objectives for class on Feb. 17 are:
| –Calculate pKa from Ka (or Ka from pKa) and understand how pKa is correlated with acid strength.
–Understand the relationship between Ka for a weak acid and Kb for its conjugate base. –Write equations for acid-base reactions, and decide whether they are product- or reactant-favored at equilibrium. –Calculate the equilibrium constant for a weak acid (Ka) or a weak base (Kb) from experimental information (such as pH, [H3O+], or [OH–] –Use the equilibrium constant and other information to calculate the pH of a solution of a weak acid or weak base. |
–Describe the acid base properties of salts, and calculate the pH of a solution of a salt of a weak acid or a weak base
https://www.youtube.com/watch?v=ukQBSkx6lcw
https://www.youtube.com/watch?v=cs9q7TIZCAA
chemistry matters 
In these videos I learned about weak bases and how to use the base dissociation constant. A weak base can be a molecule with a non bonding pair of electrons, such as amines (which contain nitrogen) or it can be an anion of a weak acid. If a pH is given, we can figure out the concentration of H and OH in the equilibrium solution. With that information and the base dissociation constant we can figure out the concentration so other components of the solution (if we know what reactions took place).
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In this lesson, I learned how to calculate molarity from knowing what the pH is. I also learned about weak bases.
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In these two videos, I learned about the weak bases and the types of bases, as well as how to calculate the pH, pOH, and concentrations of substances using the K constant and the pH or pOH.
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