Reactions, Reactions, Reactions

Today, after a long weekend of waiting, was the day of the "Double Replacement Reactions and Solubility Lab." We started out class talking about the lab procedure. After briefly discussing the post lab (questions 1 and 2 are now combined into one question, just write the Molecular Equation on one line and the Net Ionic Equation on another), we headed to the lab stations.

Our group first put a dropper-full of each sodium _____ in each respective row, and then added the various nitrates. The finished tray looked something along the lines of this:

The combinations found to form precipitates for our group are as follows:

Sodium Carbonate + Aluminum Nitrate

Sodium Phosphate + Aluminum Nitrate

Sodium Phosphate + Barium Nitrate

Sodium Sulfate + Barium Nitrate

Sodium Carbonate + Copper(II)Nitrate

Sodium Hydroxide + Copper(II)Nitrate

Sodium Iodide + Copper(II)Nitrate

Sodium Phosphate + Copper(II)Nitrate

Sodium Carbonate + Iron(III)Nitrate

Sodium Hydroxide + Iron(III)Nitrate

Sodium Phosphate + Iron(III)Nitrate

Sodium Carbonate + Silver Nitrate

Sodium Chloride + Silver Nitrate

Sodium Hydroxide + Silver Nitrate

Sodium Iodide + Silver Nitrate

Sodium Phosphate + Silver Nitrate

Sodium Carbonate + Zinc Nitrate

Sodium Phosphate + ZInc Nitrate

Here is an example for one part of numbers 1 and 2 in the post-lab:

Molecular Equation: 3Na2CO3 +2Al(NO3)3 --> Al2(CO3)3+6NaNO3

Net Ionic Equation: 2Al^3+ +3 CO^3- -->Al2(CO3)3

You can tell which one is the solid based on the fact that sodium and nitrate salts are soluble in water...(the one that isn't NaNO3).

Homework for tonight:

The lab is due Friday

as are all the worksheets and book problems because...

the test is friday. Yay!

The only matter left to be settled is who will have the challenge of following this excellent scribe post. I believe his name starts with B and ends with -obby S.

Bobby S