Law of Conservation of Mass Lab Answers 1

Law of Conservation of Mass Lab Answers 1) How does this experiment demonstrate the Law of Conservation of Matter? The mass remained the same after the experiment was completed. The mass of the reactants equaled the mass of the products. 2) Did your lab group witness the law of conservation of matter in the classroom today? Defend your answer. ANSWERS MAY VARY! (If your mass equaled the same after the experiment, your answer should be YES. If the mass was different, your answer should be NO. Make sure you have explained why your answer is YES/NO)

3) List 3 experimental errors that could have occurred. 1) The cap may have popped off 2) I may not have my balance scale equal to zero before the experiment. 3) I may have calculated the mass wrong using the scale.

4) The Law of Conservation of Matter states that matter is neither created nor destroyed in an ordinary chemical reaction. If a student takes the mass of a nail and then leaves it out to rust, the mass seems to increase. Does this violate the Law? Explain. The law is not being violated. The mass of the nail increased because the rust is the new form of a chemical reaction (it is not being created from nothing). The oxygen in the air is being pulled to react with the iron to create iron oxide. The extra mass is coming from the oxygen molecules.