Subject: Chemistry
Grade Level: 10th -12th
Unit Title: Unit 12 Acids and Bases
Timeframe Needed for Completion:
5 Days (on a 90 min per day schedule)
Grading Period: 2nd Nine Weeks
Big Idea/Theme: Acids and Bases
Understandings:
 Distinguish between acids and bases based on formula and chemical properties.
 Distinguish between Arrhenius acids and bases and Bronsted-Lowry acids and bases.
 Compute concentration (molarity) of acids and bases in moles per liter.
 Calculate molarity given mass of solute and volume of solution.
 Calculate the mass of a solute needed to create a solution of a given molarity and volume.
 Solve dilution problems: M1V1=M2V2.
 Differentiate between concentration (molarity) and strength (degree of dissociation). No calculations involved.
 Use pH scale to identify acids and bases.
 Interpret pH scale in terms of the exponential nature of pH values in terms of concentration.
 Relate the color of an indicator to pH using pH ranges provided in a table. Range should involve various values of pH (for example: 3.3
or 10.8).
 Determine the concentration of an acid or base using titration. Interpret titration curve for strong acid/strong base.
 Compute pH, pOH, [H+], [OH-]. Calculations will involve only whole number values (for example: pH or pOH values such as 3,5,8
and[H+] and [OH-] values such as 1x10-4 or 1x10-10).
 Distinguish properties of acids and bases related to taste, touch, reaction with metals, electrical conductivity, and identification with
indicators.
 Perform 1:1 titration calculations: MaVa = MbVb
 Determine the concentration of an acid or base using titration.
Essential Questions:
1. What is the relevance of common household acids and bases in
regards to chemistry?
2. How are acids and bases identified according to their physical and
chemical properties?
3. How would you describe the difference between molarity and
concentration in acids and bases?
4. How would you describe concentration of solutions in chemistry?
5. What are neutralization reactions?
6. How can the concentration of a solution be determined through
titration?
Curriculum Goals/Objectives (to be assessed at the end of the
unit/quarter)
Chm.3.2 Understand solutions and the
solution process.
Chm.3.2.1 Classify substances using the hydronium and hydroxide ion
Concentrations
Distinguish between acids and bases based on formula and chemical
properties.
• Differentiate between concentration (molarity) and strength (degree of
dissociation). No calculation involved.
• Use pH scale to identify acids and bases.
• Interpret pH scale in terms of the exponential nature of pH values in
terms of concentrations.
• Relate the color of indicator to pH using pH ranges provided in a table.
• Compute pH, pOH, [H+], and [OH-].
.
Chm.3.2.2 Summarize the properties of acids and bases
.
Chm.3.2.3 Infer the quantitative nature of a solution (molarity,
dilution, and titration with a 1:1 molar ratio)
Compute concentration (molarity) of solutions in moles per liter.
• Calculate molarity given mass of solute and volume of solution.
• Calculate mass of solute needed to create a solution of a given molarity
and volume.
• Solve dilution problems: M1V1 = M2V2.
• Perform 1:1 titration calculations: MAVA = MBVB
• Determine the concentration of an acid or base using titration. Interpret
titration curve for strong acid/strong base.
Chm.2.2 Analyze chemical reactions in
terms of quantities, product
formation, and energy.
Chm.2.2.4 Analyze the stoichiometric relationships inherent in a
chemical reaction
Interpret coefficients of a balanced equation as mole ratios.
• Use mole ratios from the balanced equation to calculate the quantity of
one substance in a reaction given the quantity of another substance in the
reaction. (given moles, particles, mass, or volume and ending with moles,
particles, mass, or volume of the desired substance)
.
Chm.2.2.5 Analyze quantitatively the composition of a substance
(empirical formula, molecular formula, percent composition, and hydrates
Calculate empirical formula from mass or percent using experimental
data.
• Calculate molecular formula from empirical formula using molecular
weight.
• Determine percentage composition by mass of a given compound.
• Perform calculations based on percent composition.
• Determine the composition of hydrates using experimental data.
Essential Skills/Vocabulary:



Determine the concentration of an acid or base using
titration
Compute pH, pOH, [H+], [OH-].
Solve dilution problems: M1V1=M2V2.
Assessment Tasks:




Acid and Base Practice
Titration Lab
Household Acid and Base lab
Practice Problems: Molarity and Dilution
Materials Suggestions:
Virtual Titration Lab
This activity can be done as a whole class or students may complete individually in a computer lab. To access this activity, go to
www.sasinschool.com. Log in, select Chemistry, then Solutions, then Acid-Base Chemistry.
Reference Tables
http://www.ncpublicschools.org/docs/curriculum/science/scos/2004/chemistry/referencetables.pdf