Hydrate Explore Lab

    A mixture is different from a pure substance because a pure substance is only one type of atom/molecules, whereas a mixture is a number of different pure substances mixed together. The Hydrate lab uses the technique heat to extract water molecules from the hydrate. Because all that is taken away from the hydrate is the water molecules, we can conclude that hydrate is a pure substance. You can support your conclusion mathematically by finding the percent composition. To find the percent composition, you need to divide the difference between the hydrated hydrate and the dehydrated hydrate, divided by the difference of the evaporating dish and hydrate, then multiply by 100. To evaluate the validity of your results, first you need to divide the part by the whole, then multiply it by 100. That number is going to be the ideal percent composition. Then you use stoichiometry to evaluate how close your results are.

Exothermic reaction in the Hydrate

 Percent composition equation

Stoichiometry equation