Teacher Portal
Acids and Bases
CELL Guide
CELL Guide
Acids and Bases
LabLearner’s 3-D Approach to Scientific Inquiry
Phase 1 – Defined Understanding
The defined boundaries of this phase provide a framework for engaging parents and identifying students’ current knowledge of the key topic(s) explored in this CELL.
Phase 2 – Dynamic Understanding
Change, activity, and progress characterize the dynamic phase. Its design will enable you to enhance students’ existing skills, interests, and understanding, as well as meaningfully build new ones.
Phase 3 – Deeper Understanding
By this point, students have moved through powerful and purposeful tasks that had them actively and intentionally construct an understanding of concepts. In this final phase, students will consolidate knowledge and make deeper connections among ideas.
Phase 1 – Defined Understanding
► Questions to Investigate in this CELL
- What properties make acids and bases chemically reactive?
- What is the relationship between the concentration of H+ ions in a solution and the chemical reactivity of strong and weak acids?
- What is the relationship between the concentration of H+ ions in a solution and the chemical reactivity of strong and weak bases?
- What is the relationship between the pH of a solution and the concentration of hydrogen ions (H+)
- How can the concentration of hydrogen ions (H+) be changed?
- What happens to the concentration of hydrogen ions (H+) when an acid and a base are reacted?
► Parent Newsletter
Encourage parents to connect to their child’s learning by providing them with a framework of the CELL. Use this link to access and share the Parent Newsletter.
► Baseline Assessment
Assess students’ current knowledge of the topic(s) being explored then set instructional and student learning goals. Use this link to schedule then invite students to take the Pre-test for the CELL.
Phase 2 – Dynamic Understanding
► Introduction and Fun Facts
Enhance your conceptual understanding by reading the student-level research on the topic(s) being explored. Use this link to access the research.
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► Links to Investigations
Go directly to the Investigation you are working on by clicking on a link below:
► Investigation 1
► Investigation 2
► Investigation 3
► CELL Vocabulary
Investigation 1:
Acid: a chemical compound that dissociates into a hydrogen ion(s) and a negatively charged ion when mixed with water
Ion: a chemical compound that has a negative or a positive charge – A cation is positively charged and an anion is negatively charged.
Hydrogen ion: When an acid is mixed with water, it dissociates into a negatively charged ion and a hydrogen ion, H+. A hydrogen ion is a hydrogen atom that has lost 1 electron, so only the nucleus and its single proton remain.
pH scale: a linear scale from 0 to 14 that is a measure of the hydrogen ion concentration.
Concentration: the ratio of the amount of solute to the volume of solvent – Concentration is usually expressed as a certain mass or volume of solute that is dissolved in 1 milliliter, 100 milliliters, or in 1 liter.
Hydroxide ion: When a base is mixed with water, it dissociates into a positively charged ion and a hydroxide ion, OH–. A hydroxide ion is a water molecule that has lost a hydrogen ion, H+, leaving its electron.
Base: a chemical compound that dissociates into hydroxide ion(s) and a positively charged ion when mixed with water
Dissociate: when a chemical compound is dissolved in a solvent, usually water, and separates into two or more ions
Investigation 2:
Solute: the substance that changes state when a solution is prepared or is present in the smallest amount
Solvent: the substance that does not change state when a solution is prepared or is present in the largest amount – In the context of these Investigations, the solvent is water.
Solution: a mixture of two or more substances that is homogeneous or the same throughout
Dilution: when a less concentrated solution is prepared by adding additional solvent
Investigation 3:
Neutralization: when an acid and a base react to form a water molecule(s) and reduce the hydrogen ion concentration
Digital Equipment Used in this CELL
► Access Scoring Rubric
Examine the scoring rubric for this CELL so that you know what your teacher is looking for in terms of performance.
Tips for Success:
Google Classroom
Phase 3 – Deeper Understanding
►Deep Analysis Classroom Discussion
These questions can be used to elicit in-depth discussions based on the lab experience. Teachers may use any or all of these discussion points depending on the time available.
► Summative Assessment
Evaluate student learning at the end of the CELL by comparing the Summative Assessment to students’ Baseline Assessments. Use this link to schedule then invite students to take the Post-test for the CELL.