Lab+3+Water


 * Exercise 1: Colorimetric Detection of pH**

1. pH is a measure that indicates the acidity or basicity of a water-based solution. 2. Changes in pH make hydrogen chemically active. 3. When something is acidic that means it has a pH of less than 7 and react with bases and metals. They are red in color. 4. When something is basic it has a pH of more than 7 and can accept hydrogen ions. Bases are blue in color. 5. It is ten times more acidic. 6. Acid tastes sour and alkaline tastes bitter on the human taste buds.

a. The body utilizes various buffers like bicarbonate and ammonia to regulate a homeostasis between acids and bases, because someone could be severely harmed if he or she had too much of either. pH of 7 is neutral between acid and base.

b. Carbin acid-bicarbonate buffering helps keep an acid-base balance and is extremely important in keeping this neutrality in the human blood stream and preventing serious disease or medical complications.

//Red Cabbage as Colorimetric Indicator//
 * Results of Using Red Cabbage as a Colorimetric Indicator**
 * = Chemical Added ||= Number of Drops ||= Color ||= pH Using Paper ||
 * = Control ||= 0 ||= Clear ||= 7 ||
 * = Vinegar ||= 15 ||= Pink ||= 3 ||
 * = Baking Soda ||= 100 ||= Clear ||= 4 ||

Photo By Steven Hays (we had to share cabbage due to deficient amount for everyone)

Photo By Steven Hays


 * Exercise 2: Determining the Resistance of a Buffer**


 * Effective of Buffer on pH Change in Reaction to Vinegar Addition**


 * Chemical Added || Number of Drops || Color || pH Using Paper ||
 * Control || 20 || Pink || 3 ||
 * Buffer || 110 || Clear || 4 ||

//Resistance of a Buffer//