Blog Week 27

On Monday, we were in the computer lab working on a way to help us name compounds. On Tuesday, we continued our work on that, I used popplet to do my work. This is the link to my work: http://popplet.com/app/#/941419. We also talked about blogs and how they will now be graded. Nathon Jones will be grading my blog and I will be grading his. He will make sure I fully understand what we learned during class and if I added pictures. On Wednesday, we did an experiment. We took 70mL of HCl acid and mixed it with .5 grams of metal. But first we filled the trough with water and two bottles full of water to catch the gas and we could find out the amount of gas by water displacement. We then added the calcium metal to the HCl acid and gas began to fill up the bottle. At the end of the experiment we collected 650mL of gas, which converted into 0.65L of gas. While the gas was being made the flask became warm and the HCl acid became white and cloudy. Once we collected the gas we tested it for combustibility and it was combustible. We found out that 0.10 mol is in 1L. There was 0.07L of HCl and I can not figure how to convert it to mols, I know 1L is 0.10 mols but I don't know how to get 0.07L into mols. Then Calcium had a mass of .5 and I used the equation grams to mols to get the number of mols for Calcium. 0.5/x = 40.08/1 -> .5=40.08x -> x = 0.0125 mol. The number of mols is 0.0125 for Calcium. I haven't figured out the gas that was produced yet. Here are some pictures from the lab:

 On Thursday, we debriefed our lab. We wanted to answer these questions: 1) Temperature change? 2) The gas? 3) Chemical reaction? 4) Stoichiometry?. Stoichiometry means the measurement of chemical reactions. The temperature changed in the flask, when the calcium was added to the Hydrochloric acid, the flask became warm. The gas that was created was CaCl2 + H2. The equation was Ca + 2HCl -> CaCl2 + H2, because Ca and H can't combine because they are both positive, but for Ca and Cl to combine we need one Ca with a charge of +2 and two Cl to get a charge of -2; to "cancel" out the the Ca charge. Then the H2 is there because it doesn't dissolve. The ratio for this problem: 1 Ca need 2 HCl. Reaction is the arrangement of atoms to form different substances. On Friday, we worked on the three worksheets we got on Thursday. I finished all the worksheets and tweeted my whiteboard picture to Mr. Abud. Here's some questions from the worksheets:
~BaCl2 + F2 -> BaF2 + Cl2. This is the reaction because Ba has a charge of 2+ and Cl has a charge of 2- and F2 has a charge of 2-. So Ba combines with F2 because they make a neutral charge together and Cl2 doesn't go away and it can't combine with the neutral charge.
~NaCl + Ag -> AgCl + Na This is the reaction because Na has a charge of 2+ and Cl has a charge of 2- and Ag has a charge of 2+. So, Ag and Cl combine to become a neutral compound and Na doesn't go away.