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04.05 Chemical Reactions: Combustion Lab

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Angelica Lara

on 3 June 2014

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Transcript of 04.05 Chemical Reactions: Combustion Lab

04.05 Chemical Reactions: Combustion Lab
1. Write a balanced equation for each reaction observed in this lab.
The mass would stay the same because if it changed it would violate the law of conservation of mass.
3. One of the reactions you conducted can actually be categorized as two different types of reactions. Which reaction is this, and what are the two types of reactions?
It would be the Hyrdochloric acid and Magnesium because although it stayed the same it still bubbled slightly.
Data and Observations
2Fe(III) (s) + 3Cu(SO4) (aq)
Fe2(SO4)3 (aq) + 3 Cu (s)

• Pb(NO3)2 (aq) + 2KI (aq) PbI2 (s) + 2KNO3 (aq)
• Mg (s) + 2HCl (aq) MgCl2 (s) + H2 (g)
• 2H2O 2H2 + O2
• 2Mg + O2 2MgO
2. If you were to measure the mass of magnesium and hydrochloric acid before combining them in the test tube, how would that mass compare to the mass of reactants left in the test tube after the reaction? Explain your answer and how it corresponds to the law of conservation of mass.
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