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.

Conservation of Matter

Lab Summary

Test the law of conservation of matter for both physical and chemical changes by finding the mass of the reactants before the chemicals are reacted and the mass of the products after the reaction has occurred.

 

Theory

In this investigation, students test the law of conservation of matter for both physical and chemical changes.

Method

Students conduct the following procedures:

  • Find the mass of the reactants before the chemicals are reacted and the mass of the products after the reaction has occurred (in a chemical reaction where a precipitate forms).
  • Measure the mass of a solute and a solvent separately and the mass of the solution after combining the two.
  • Determine the mass of gas produced during a chemical reaction by calculating the difference between the mass of the initial reactants and the mass of the final products (the final products do not include the escaped gas).

Materials Used:

Balance 
Test tube, 15-mm × 100-mm - 2
Beaker, 250-mL 
Plastic soda bottle (with cap) - 500-mL
Sodium nitrate - 5 g
0.1 M Sodium sulfate - 5 mL
0.1 M Strontium chloride - 5 mL
Sodium bicarbonate - 8 g
5% Acetic acid - 30 mL
Distilled (deionized) water - 10 mL

The Associated Bundle:

Interface Required

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