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.

Buffer Solutions

Lab Summary

Use a pH sensor to demonstrate the properties of buffer solutions and buffer capacity.

Theory

Students learn the properties of buffer solutions and buffer capacity.

Method

Students gain experience conducting the following procedures:

  • Preparing three buffer solutions using different concentrations of acetic acid.
  • Testing the buffering capacity of the three buffers by adding HCl.
  • Calculating the predicted and actual buffer capacity of the three buffer solutions.
  • Comparing the buffer capacity and buffering effect of the three buffer solutions and water.

Sensors / Equipment Used:

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:

Beaker, 400-mL 
Buret, 50-mL 
Pipet, 5-mL 
Pipet bulb 
Beaker, 100-mL 
Beaker, 25-mL - 2
Graduated cylinder, 250-mL 
Magnetic stirrer and stirring bar 
Ring stand 
Clamp, buret 
Clamp, utility 
Funnel 
2.000 M Sodium hydroxide (NaOH) - 250 mL
0.1 M Acetic acid (HOAc) - 250 mL
0.3 M Acetic acid (HOAc) - 250 mL
0.5 M Acetic acid (HOAc) - 250 mL
6.00 M Hydrochloric acid (HCl) - 5 mL
Buffers, pH 4 and pH 10 - 10 mL
Wash bottle with deionized water

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.