What procedure could be used to demonstrate that matter is conserved during a chemical change or reaction?

5 answers

You could use a closed system. Weigh the material initially, let the reaction take place and weigh the system again. It would weigh the same. Look up the experiment by Lavoisier when he decomposed HgO under a Bell Jar.
It’s physical change not chemical
Find the mass of a piece of ice. Let the ice melt. Find the mass of the liquid water.
find the mass of an acid and a base. combine them to produce water and a salt. find the mass of the water and the salt.
Which procedure could be used to demonstrate that matter is conserved during a chemical change or reaction?