ch7 MgO labm

CH7 MAGNESIUM OXIDE LAB M NAME_____________PD_____

PURPOSE: Find the % of oxygen in magnesium oxide by experiment.

PROCEDURE: As described by teacher & see p 258-259

DATA:

Mass of empty crucible_________

Mass of crucible and metal__________

Mass of crucible and product_________

CALCULATIONS:

Mass of metal___________

Molar mass of metal_________

Moles of metal __________ work:_______________________

Mass of oxygen _________

Molar mass of oxygen_________

Moles of oxygen ___________ work;________________________

Mass of product__________

Formula of product _________

Molar mass of product_________

Moles of product____________ work:_______________________

% of oxygen in product from lab data: _________ work:

% of oxygen in magnesium oxide from formula: ________ work:

CONCLUSIONS:

Write a word equation and a balanced chemical equation for the reaction. Include states.

Do you think you did the experiment well? Why or why not?

Did it appear that matter was created or destroyed? Why?

When wood burns does it appear that matter is created or destroyed? Why?

Do you think that matter is really created or destroyed? Why? Describe an experiment that could be done to provide evidence for your answer.

On the back of this page, sketch the experiment.