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.

Acid Base Titration

Lab Summary

Use a pH sensor and drop counter to determine the molar concentration of a strong acid solution by titrating measured volumes with a strong base of known concentration.

Theory

Students determine the molar concentration of a strong acid solution by titrating measured volumes with a strong base of known concentration.

Note: Use the sodium hydroxide solution students determined the concentration of in the “Standardizing a Solution of Sodium Hydroxide” activity.

Method

Students gain experience conducting the following procedures:

  • Performing a titration and using the equivalence point volume of the titrant to calculate the concentration of the analyte.
  • Calibrating a pH sensor and drop counter.

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.

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.

Materials Used:

Micro stir bar
Magnetic stirrer
Buret, 50-mL
Graduated pipet, 25-mL
Pipet bulb
Beaker, 100-mL -2
Beaker, 25-mL - 2
Clamp, right-angle
Clamp, buret
Ring stand
Parafilm® or aluminum foil
Funnel
Hydrochloric acid, unknown concentration - 70 mL
Sodium hydroxide (NaOH), standardized by students in previous activity - 100 mL
Buffers, pH 4 and pH 10 - 10 mL
Deionized water - 100 mL
Wash bottle with deionized water
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.