Acidic and Basic Solutions

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Presentation transcript:

Acidic and Basic Solutions

Bell Work Define the following terms: Solubility Heterogeneous vs. Homogenous Crystallization vs. Precipitation Solute vs. Solvent

Acids Acids: substances that release positively charged Hydrogen ions. This positive charges hydrogen molecule combines with a water molecule to create a Hydronium ion.

Batteries contain acid! Corrode (Leave holes) fabric, skin, and paper. Acidic Solutions Properties of Acids: Sour taste Conduct electricity Batteries contain acid! Corrode (Leave holes) fabric, skin, and paper.

Acidic Solutions Uses of acids?

Acidic Solutions Uses: Food items: salad dressing, lemon, limes, oranges. Products: Paint, fertilizers, plastics Environment: Cave formation, acid rain Beautiful Cave formations: https://youtu.be/IKZ9EHewjZg

Basic Solutions Bases: are substances that accept hydrogen ions When dissolved in water, most bases leave behind a negatively charged Hydroxide ion. (OH-)

Basic Solutions Properties of Bases: Most Soaps are Basic Feel Slippery Bitter taste Also corrosive and can cause burns and damage tissue Can also conduct electricity However, Basic solutions are not reactive with metals like acids!

Basic Solutions Uses of Bases??

Uses of Basic Solutions Soaps and Cleaning Products Chalk Treat lawns and Soil

Compare and Contrast Acids and Bases Bell Work Compare and Contrast Acids and Bases

What is pH? pH is a measure of how acidic or basic a substance/solution is. pH Scale:

Indicators Indicators: Compounds that react with acid and base solutions and produce certain colors, depending on the solutions pH. Examples: Ph Strips & Concentrated Cabbage Juice 

Neutralization How could you use the idea of pH to answer the following question: If you spill a very dangerous acid on the floor how could you safely clean it up?

Neutralization You combine an acid and a basic solution to become more neutral Ex: HCl Acid (0) you would mix it with (14) to make a (7) Neutral.

Practice what you learned pH sorting Activity

Solute -vs -Solvent Simple solutions are basically two substances that are evenly mixed together. A solute is the substance to be dissolved (sugar). The solvent is the one doing the dissolving (water).

Name the solute and solvents in the following examples … Solution Solute Solvent Lemonade Coffee and cream Tea KoolAid Ocean water