Acid+Base+Neutralization

**Science 10 Problem Based Learning Curriculum Resource: Acid Base Neutralization**
As a continuation to the chemical spill containment at the Millet farm first visited in the Safety Dance case, students once again are working for Cherry Chemical. In this case, students are training fellow staff members; the staff needs to know more of the basic chemistry and scientific principles involved in chemical spill containment. Using HCl as an example, students design an experiment to explain the neutralization of this acid and prepare a demonstration and explanation of this to colleagues. Students then go on to understand and explain the neutralize HCl with a dilute alkaline solution of soda ash (sodium carbonate, Na2CO3), or lime (calcium oxide, CaO) and must write balanced chemical equations for each, identifying acids, bases, and salts. The nature of ionic compounds is explored. Using the collision model, students explain factors that influence rate of reaction and also describe what is happening to the H+ion. Using some common household acids and bases as an example, students an experiment, ensuring they include the balanced chemical equation, description of the reactants and products as well as any factors which could affect the rate of the reaction.
 * Case Focus: **

//How can we design an experiment to show the neutralization of an acid in such a way that fully explains the reactants and products formed including factors that affect rate of reaction?//
 * Sample Problem Statement:**

Unit: Physical Science: Chemical Reactions (CR) CR1: Observe common chemical reactions in your world CR2: Represent chemical reactions symbolically using models, word equations, and balanced chemical equations CR4: Identify factors that affect the rates of chemical reactions CR5: Investigate chemical reactions involving acids and bases
 * Objectives Met: **

To access this PBL unit, please contact Scott Stephens.

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