Thursday, January 12, 2012

Lab 6.1 Double Replacement Reactions

My predictions were not all accurate. The combination of copper chloride and potassium dichromate did not match up. I thought they would have no reaction, but they did. I would guess that dichromate is the precipitate, even though table F tells us it's soluble.

To write a double replacement reaction:
-Find the charges of every element. These will either be in the periodic table or in tables E and F.
- If there is more than one of that element, add the charges accordingly. (If potassium has a charge of +1, 2 of them will have a charge of +2.)
-Make sure the charges equal out to 0. If they don't, change the number of the elements, not the charges.
- Switch the elements like this: A+B,C+D ---> A+C,B+D
-Check again to see if the reaction is balanced out so the charge equals zero.
- If the question asks you to, find the precipitate. This will be whatever is insoluble in the reaction.

Phosphorous, nitrogen, and chlorine are carcinogen compounds, that can be removed with Ozone. Ozone is generated by passing oxygen through a high voltage and making a third oxygen atom. Ozone is very unstable and oxidizes most organic material it comes in contact with, which is why it's very useful for destroying these carcinogenic compounds.