Acids, Bases, and pH Distinguish between acids and bases and use indicators (including litmus paper, pH paper, and phenolphthalein to determine their relative pH).

Bell Ringer Candy Crush Do you prefer lemon head, sour pack, and sweet tart candies? Why or why not?

Essential Question What acids and bases do you use and/or consume on a regular basis?

Purpose Distinguish between acids and bases.

Standard Distinguish between acids and bases and use indicators (including litmus paper, pH paper, and phenolphthalein to determine their relative pH).

Quick Review Physical Properties Vs. Chemical Properties Physical Changes Vs. Chemical Changes Sort various tabs as into specific categories based on characteristics given. Each partnership will have 1 bag of tabs to share. Physical Properties and Changes Chemical Properties and Changes

Bell Ringer -3-4 Self Evaluation Reflect back on your supersonic sort from yesterday. How did you and your partner do on a scale of 1-5? Explain. Did the partner collaboration help you? Did you and your partner disagree on the sorts? How did you end the disputes?

Electronic Poster Creation Research “Acids and Bases” using your textbook, PASS Workbook, and Ipad. Create an electronic poster based on the rubric provided on the next page. You will use the rubric to determine your grade. Be ready to share out!

7-5.6 Electronic Poster Rubric (Ipad Apps to Use: Explain Everything or Pic Collage Items to Include: Possible Points (31) 1.Appropriate title2 1.Define acid2 1.Define base2 1.Define neutral solution2 1.Define pH scale, give the range4 1.State range for acids2 1.State range for bases2 1.Give 4 examples of acids4 1.Give 4 examples of bases4 1.Give an example of a neutral solution1 1.Include 2 colored graphics2 1.Neat and Organized4 )

Acids, Bases, and pH Distinguish between acids and bases and use indicators (including litmus paper, pH paper, and phenolphthalein to determine their relative pH).

pH Scale A tool used to measure how acidic or basic a solution is Scale goes from 0-14

Acids Any solution with a pH less than 7 Range from 0-6 The closer the number is to 0, the more acidic a substance is Sour taste Can be eatable like citric fruits Can be harmful to metals, plastics, clothing, and skin; can corrode or eat through materials Examples-lemons, limes, apples, shampoo, vinegar, and bananas Never use touch or taste to identify an acid!!!!!

Bases Any solution with a pH greater than 7 Range 8-14 The closer the number is to 14, the stronger the base is Bitter taste, slippery to the touch React with acids to create neutral solutions Can react with or corrode materials Examples: unsweetened cocoa, ocean water, milk of magnesia, soap, ammonia, baking soda, antacids, and lye, bleach Never use touch or taste to identify a base!!!!!

Neutral Solution A solution that is neither an acid nor a base pH of 7 Examples: pure water, eggs

Indicator #1 -Litmus Paper Common indicator Litmus paper contains a special dye that makes the paper change colors in the presence of an acid or base Litmus paper is found in the colors red and blue Blue litmus paper turns red when it comes in contact with an acid. MEMORY DEVICE- The blue smurf turned red when it saw an acid. The blue litmus paper stays blue when it comes in contact with a base.

Indicator #1 -Litmus Paper Red litmus paper turns blue when it comes in contact with a base. MEMORY DEVICE- Red Clifford turned blue when he ate berries. MEMORY DEVICE- The red robin was singing blues in his basement. The red paper stays red when it comes in contact with an acid. Both red and blue litmus paper turn purple when dipped in a neutral solution.

Indicator #2 Phenolphthalein A colorless chemical that is used to test for the presence of a base. It turns bright pink or magenta when it comes in contact with a base. MEMORY DEVICE-Pink Magenta from Blues Clues It remains colorless when it comes in contact with an acid or neutral solution.

pH paper An indicator in the form of paper strips The strips show a range of colors depending on the pH of the solution it comes in contact with. Use: dip the pH paper in a solution, then compare it to the chart on the vial or container with the pH paper The chart identifies the pH value of the solution based on the color of the paper. Example: A solution that turn the pH paper lime green has a pH of _____? Example: What color will pure water turn the pH paper? Why?

ACID-O BINGO Game Use the given grid to participate in a review game about acids bases and solutions.

Essential Question What acids and bases do you use and/or consume on a regular basis?