Featured in PASCO’s Chemistry through Inquiry Teacher Guide

Chemistry through Inquiry Teacher Guide

(PS-2871C)

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

Diprotic Titration Reaction

Lab Summary

Use a drop counter and a pH sensor to determine the concentration of a sodium carbonate solution, learning that chemical reactions can be the sum of several individual reactions.

 

Theory

Determine the concentration of a sodium carbonate solution. Through this investigation, students:

  • Learn that chemical reactions can be the sum of several individual reactions.
  • Learn that the conjugate base of a polyprotic acid generally accepts one proton at a time.

Method

Students conduct the following procedures:

  • Perform a strong acid-strong base titration.
  • Calculate the concentration of an unknown sodium carbonate solution using collected data and stoichiometric calculations.
  • Calculate the number of moles and liters of carbon dioxide gas produced using collected data and stoichiometric calculations.

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:

Magnetic stirrer 
Beaker, 50-mL - 2
Beaker, 250-mL 
Graduated cylinder, 50-mL 
Graduated cylinder, 100-mL 
Transfer pipet 
Buret, 50-mL 
Buret clamp 
Ring stand 
Right-angle clamp 
Funnel 
Waste container 
Wash bottle filled with distilled (deionized) water
Buffer solution, pH 4 - 25 mL
Buffer solution, pH 10 - 25 mL
Distilled (deionized) water - 200 mL
Sodium carbonate solution - 40 mL
1.0 M Hydrochloric acid - 110 mL

Your Bundle Options:

Option 1:

Chemistry Starter Sensor Bundle

(PS-2921)

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

(PS-2927C)

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.