Featured in PASCO’s Chemistry through Inquiry Teacher Guide

Chemistry through Inquiry Teacher Guide


Features over 25 inquiry based labs covering the fundamental concepts of lab skills, structure & properties of matter, chemical reactions and more.

pH of Household Chemicals

Lab Summary

Use a pH sensor and common household chemicals to relate pH and
hydronium ion (H3O+) concentration, classifying solutions as acidic, basic,
or neutral.


Working with common household chemicals, students develop an understanding of the relationship between pH and the hydronium ion (H3O+) concentration. Through this investigation, students:

  • Classify solutions as acidic, basic, or neutral based on their pH or hydronium ion (H3O+) concentration.
  • Compare the relative strengths of acids and bases based on their pH or H3O+ concentration.


Students conduct the following procedures:

  • Measure the pH of common household chemicals and classify them as acids or bases.
  • Calculate the hydronium ion (H3O+) concentration from the measured pH values and graph pH versus H3O+ concentration.

Sensors / Equipment Used:

PASPORT Chemistry Sensor


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

Materials Used:

Beaker, 50-mL - 2
Graduated cylinder, 50-mL 
Graduated cylinder, 10-mL 
Test tube, 15-mm × 100-mm - 10
Test tube rack 
Wash bottle and waste container 
Buffer solution pH 4 - 25 mL
Buffer solution pH 10 - 25 mL
White vinegar (~5% acetic acid) - 5 mL
Lemon Juice - 5 mL
Soft drink - 5 mL
Window cleaner - 5 mL
Water (from the tap) - 5 mL
Milk - 5 mL
Coffee - 5 mL
0.5 M Sodium bicarbonate - 5 mL
Liquid soap - 5 mL
Bleach - 5 mL

Your Bundle Options:

Option 1:

Chemistry Starter Sensor Bundle


A sensor bundle specifically designed to get you started using probeware in your chemistry lab. Also: perform 22 Lab Activities from Chemistry through Inquiry teacher guide.

Option 2:

Chemistry Standard Sensor Bundle


Contains the sensors and probes needed to perform all 17 experiments in the Advanced Chemistry Teacher Guide and all 25 labs in the Chemistry through Inquiry Guide.

Interface Required

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