Featured in PASCO’s College Chemistry Instructor Guide

College Chemistry Instructor Guide

(PS-3803A)

College Instructor edition with 36 experiments covering introductory and general chemistry topics.

Indicators for pH

Lab Summary

Use a drop counter and pH sensor to determine the CO2 content of a beverage by performing titrations with multiple acid-base indicators.

Theory

Students determine the CO2 content of a beverage.

Method

Students gain experience conducting the following procedures:

  • Performing titrations with multiple acid-base indicators.
  • Comparing the use of pH indicators with electronic sensors for detecting the equivalence point of a titration.

Sensors / Equipment Used:

PASPORT High Accuracy Drop Counter

(PS-2117)

Is a professional drop counter that allows students to capture detailed titration data. For use with PASPORT Interfaces.

PASPORT Chemistry Sensor

(PS-2170)

Allows students to measure Temperature, pH/ISE/ORP, Absolute Pressure & Voltage in one sensor. For use with PASPORT Interfaces.

Materials Used:

Micro stir bar
Clamp, right-angle 
Clamp, buret 
Buret, 50-mL 
Beaker, 25-mL - 2
Beaker, 250-mL - 2
Erlenmeyer flask, 250-mL 
Graduated cylinder, 100-mL 
Phenolphthalein - 5 drops
Methyl orange - 5 drops
Magnetic stirrer and stir bar 
Ring stand 
Commercial soda drink - 1 can
Kimwipes® 
4.00 M HCl solution - 100 mL
1 M NaOH solution - 100 mL
Wash bottle with deionized water 
Funnel 
Balloon (fits on Erlenmeyer flask; holds- 100 mL)
Buffers, pH 4 and pH 10 - 10 mL
Cotton swab or tissue 

The Associated Bundle:

Advanced Chemistry Standard Sensor Bundle

(PS-2928A)

Contains the probeware for completing experiments in the College Chemistry lab manual.

Interface Required

This experiment may require software and an interface for data collection.