10/10/13 Blog Post

Immediately we checked in the homework, which included the pages “Classifying, Predicting, and Balancing, Oh My!” and “Types of Reactions”. The key containing them both is on Moodle. Also for homework, we had to write down and balance this equation:

copper (II) sulfate reacts with sodium phosphate to produce sodium sulfate and copper (II) phosphate.

The correctly balanced equation is:

3CuSO4+2Na3PO4 ----> 3Na2SO4+Cu3(PO4)2

After looking over the homework, the subject went over to combustion reactions.

• Any reaction that reacts with oxygen and produces heat and flame is a combustion reaction.
• They will always produce carbon dioxide (CO2) and water (H2O).

We received packets from the front of the room, which contains today’s lab. There is no write up for this lab; you only need to finish the packet. This packet can be printed off of Moodle.

This is the data that I received for this lab:

(I was not able to obtain all the data. If you were absent, you can ignore the other 3 reactions.)

           Reactant(s)        Evidence of Reaction             Products

Reaction 1	Magnesium: small metal ovals.	Mg flashes white/yellow when heated with burner.	Mg curled up, turned white and powdery in burned areas.
Reaction 2	Magnesium: small metal ovals. Hydrochloric acid: a clear liquid.	When combined in a test tube, they immediately started to fizz up and produce heat. A popping sound was made when a match was dipped in.	A hot and bubbly liquid.
Reaction 3	Ammonium carbonate: a white, clumped up powder.	When placed in a test tube and held over a match, it became a dusty brown liquid.	A dusty brown liquid.
Reaction 4	Calcium carbonate: little white stones, the size of jelly beans. Hydrochloric acid: a clear liquid.	The CaCO3 became clear when submerged in the acid.	A clear stone submerged in a liquid.
Reaction 6	Sodium phosphate: a clear liquid. Copper (II) chloride: a blue liquid.	When mixed, the liquid stays blue, forms a white precipitate.	A teal liquid with a clump of white goo inside.

The homework is the worksheets inside the packet. Also, there is a quiz tomorrow. The homework and the Predicting Products Practice sheets (which can be found on Moodle) should help in your studying.

The next poster shall be Bobby R.