Innovating Science® - APï®® Chemistry Lab #4: Acid in Fruit Juices and Soft Drinks

Study how the concentration of acids in various consumer beverages may be determined by titration with sodium hydroxide. Students will determine the proper indicator to use in the titration of a weak acid. Students will create an experiment to calculate the molar concentration of acid in a beverage. The activity contains enough materials for 15 groups of students as well as a Teacher's Guide and Student Study Guide Copymasters. This lab meets Big Idea 1, Investigation 4, Primary Learning Objective 1.20.

Kit Includes:
10g Potassium Hydrogen Phthalate
4 X 25g Sodium Hydroxide
100mL Hydrochloric Acid, 0.1M
100mL Acetic Acid, 0.1M
500mL Sodium Hydroxide, 0.1M
25mL Phenolphthalein, 1%
25mL Methyl Red, 0.02%
25mL Bromothymol Blue, 0.04%
1 pH Strips 1-14 Pkg/100

Materials needed but not supplied:
Buret, 50mL
Lab Stands with Clamps
10mL Volumetric Pipettes
25mL Volumetric Pipettes
Test Tubes
Test Tube Racks
Pipette Bulbs or Pi-Pumps
Various Erlenmeyer Flasks
Various Graduated Cylinders
Distilled or Deionized Water
Wash Bottles
Electronic Balance, 0.001g resolution or better (optional)

DOT Info:
Small quantity exemption 173.4
THIS PACKAGE CONFORMS TO 49 CFR 173.4 for domestic highway or rail transport only

WARNING: This product can expose you to chemicals including Phenolphthalein, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.