Question

The law of mass conservation is another fundamental law in chemistry. this law states that matter can neither be created or destroyed, which means that in a chemical reactions where all the reactant is converted into product, the mass of reactant must be equaly equal to mass of product produced. A) consider 2 precipitation reactions B) experimental procedure that you can use in lab C) contemplate how you might visually represent this data (I) what variables might you need to plot (ii) how would your choice of graph illistrate the law of mass conservation

Answer 1

A) consider 2 precipitation reactions

Ag + Cl ---> AgCl

Mg + OH --> Mg(OH)2

B) experimental procedure that you can use in lab

You just need the powder of each elemet in solution, then weigh them in a analuytical balance

Measure a volum of water,

Filer precipitate

Weigh preciitate, then relte to moles /mass used

C) contemplate how you might visually represent this data

Visually, te precipitate will be formed (a solid mass) in the flask, you may wat to wait in order to get 100% f precipitate

(I) what variables might you need to plot

You may want to plot mols/mass of precipitate vs moles/mass in solution

(ii) how would your choice of graph illistrate the law of mass conservation

The law of conservation may be proved if you weight the mass prior mixing, the moles in solution ad the mass after filtering (precipitated)

Total mass should be constant

i.e. mass of flask + mass of water + mass of metal + mass of precipitate , etc.. will be always a constant