School : Senior High School
Topic : Solubility product of Constant (Ksp)
Grade : XI
Semester : 2
Time Allocated : 30 minutes
I. Competency Standard
Understanding properties, measuring method and applying of acid base solutions.
II. Basic Competency
Predicting precipitation from a reaction based on solubility and solubility product constant principle
III. Indicator 1. Explain the meaning of Solubility Product Constant (Ksp) 2. Write down the Solubility Product Constant’s Formula
Learning Objectives
Cognitive and psychomotor
Students are able to: 1. Identify anions and cations presence in the solution with precipitation based on the value of solubility product constant (Ksp) 2. Predicting relative solubility of some salts based on the value of solubility product constant (Ksp) 3. Write down the solubility product constant’s formula 4. Predicting precipitation from a reaction based on the value of solubility product constant (Ksp) 5. Communicate the observations result
Affective
1. Student active answer the questions
IV. Learning Materials 3. Prerequisite concept
Solubility is the amount of solute that dissolves in a given quantity of a particular solvent at a given temperature to give a saturated solution.
Neutralisation
When an alkali is added to an acid, the pH of the mixture rises as the alkali reacts with it forming neutral products. An acid added to an alkali causes the pH to fall because the alkali is removed by reaction with the acid. A reaction in which acidity or alkalinity is removed is called neutralisation. A neutralisation involving an acid and a base (or alkali) always produces salt and water (and nothing else).
Acid + base salt + water 4. Main Concept
Salts differ in their solubilities. In general, compounds of alkali metals are soluble in water. Many ionic compounds however, are insoluble. Most “ insoluble” salts will