Presentation on theme: "Acids and Bases. Acids Acid- a compound that produces hydrogen ions in a solution. -Ex.- H combines with H2O to make H3O which is an acid. -The more."— Presentation transcript:
Acids Acid- a compound that produces hydrogen ions in a solution. -Ex.- H combines with H2O to make H3O which is an acid. -The more Hydronium ions the more acidic the substance. -Strong acids are corrosive. They can eat metal. -NEVER TOUCH OR TASTE A STRONG ACID!
Acid AA cids Taste Sour OO ranges contain citric acids; apples contain malic acid OO rganic acids come from nature- Weak Acids AA nts are also naturally acidic. Unripened fruit has a higher acidity than ripened fruit. That is why it tastes more sour!
Bases Base- A compound that produces hydroxide ions in a solution. NEVER TOUCH OR TASTE A STRONG BASE. Alkaline- another name for a base Bases are slippery feeling and taste bitter. To neutralize an base add an acid. To neutralize an acid, add a base.
pH pH- the measure of the hydronium ions in a solution. The lower the number the MORE acidic, the higher the number the MORE base. Typical pH scale ranges from 0-14 0-6 is acidic 7 neutral 8-14 base (alkaline)
pH comes from the French “pouvoir hydrogene,” which means “hydrogen power.”
pH Indicator Indicator- substance that changes color in an acid or base. Litmus paper- turns red or blue in acid or base. Red paper turns blue in a base Blue paper turns red in an acid
pH Indicator UU niversal Indicator- mixture of several indicators so that each number on the pH scale shows a different color. CC an be a solid or liquid TT he colors representing the number changes with the brand of indicator Liquid Indicator Natural liquid indicator made from cabbage juice. Paper universal indicator