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Learn about common acids and bases, their properties, and how they affect the pH scale. Explore the elements that define acids and bases, their dissociation process, and neutralization reactions. Discover the pH levels of various substances and common salts produced from neutralization reactions.
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Common Acids The table lists some common acids. Which element do they all have in common?.
What is an acid? • An acid is a substance that produces hydrogen ions when dissolved in water. • Nearly all acid molecules contain hydrogen atoms. (H) • When an acid mixes with water, the hydrogen atom separates from the acid. Because of this, we also say that acids produce hydrogen ions(H+). in solution.
Common Bases The table lists some common bases. Which element(s) do they all have in common?.
What is a base? • A base is a substance that produces hydroxide ions (OH-) when dissolved in water. • When a base like sodium hydroxide (NaOH) dissolves in water, hydroxide ions separate from sodium ions. • This separation is called dissociation.
Dissociation is a PHYSICAL process! • When acids, bases, and salts dissolve in water, their atoms are separated… • https://www.youtube.com/watch?v=EBfGcTAJF4o • but, when the water evaporates, they simply re-join. • https://www.youtube.com/watch?v=mvvNruJ-8LY
The pH Scale The pH scale helps classify solutions as acidic or basic. It is a measure of the concentration of H+ ions. What is the pH of the substances in the boxes? Pure Water Lime Juice Antacid Blood Hydrochloric Acid Vinegar Draino Baking Soda ACIDIC NEUTRAL BASIC
Neutralization What would be the appropriate color to indicate the pH levels?
Common Salts The table lists common salts produced from neutralization reactions. Complete the table with the formula for each salt.
Predict the pH Where on the pH scale does each item belong? Soap Tomato Ammonia
Acid and Base Properties Which common items are acids and which are bases?