Experiment on the Four Classes of Chemical Reactions

" The crucible and its contents were indeed measured and the trade recorded.

a) mass of empty crucible =53.200g

b) mass of crucible positive 2g Mg =55.200g

c) mass of crucible plus "unknown" product

d) mass of "unknown" product afterwards wake energy = 3.316g

2. Where did the extra mass come from? The extra mass came

3. The equilibrize equation for the synthesis reaction that occurred is:

2Mg (s) + 02 (g) ? 2MgO (s) (The Reactivity, 2005)

To a 150 mL Erlenmeyer flaskful was added 5g grunter (II) change hydroxide hydrate (Cu2CO3(OH)2* urine, and the flask and contents weighed. The flask was heated with a Bunsen burner until the potassium intricate turned discolour. The flask was then removed from the heat and the mass of the flask and its contents determined.

molecular weight of Cu2Co3(OH)2 =221.116g

Molecular weight of H2O = 18.015g

Weight of flask and contents after heating =

1. A hydrate is a compound that has urine molecules attached to it by electrostatic forces, and these water molecules are released when the compound is heated (Gormley, 2004). The formula of copper carbonate hydroxide hydrate, Cu2CO3(OH)2*H2O has one water molecule bound to each copper carbonate hydroxide molecule.

From the ratio of the mass of the blac

k product to the initial 5g copper carbonate hydroxide hydrate placed in the flask, the remaining black compound could be the anhydrous copper carbonate hydroxide.

15 mL of sodium hydroxide (NaOH) was added to one 50 mL beaker and 6 mL nickel (II) chloride was added to another 50 mL beaker. The two solutions were observed and then the entire contents on one beaker were poured into the other, and observations made.

then there is a reaction with atomic number 8:

1. The ions present in the aqueous solution of Naoh were:

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