The Ninja From Down Under

Today we had shortened classes and Mr. Liberman was not there. So, we had a sub and we got to watch Myth Busters! SWEAAAAAAAAAAAAT! This episode was the second one they have done on ninjas. They were retesting if a ninja could actually catch an arrow, but this time they had the most accomplished ninja in the world today who happened to be Australian. Adam and Jamie the two hosts talked about how that the speed of an arrow does not change on release from the bow to impact with its target. The first experiment was to see if the ninja could catch tennis balls going 80 mph's and he caught 22 in a row a Guiness World Record. Then Jamie tried to accomplish this feat thinking it was being overplayed he was soon pelted relentlessly with thennis balls quite amusing. Next, Carry, Grant, and Tory tested the old assination technic that ninjas would lay in wait in river banks breathing out their blow guns and then using them to kill their target. First they checked how long Tory could stay underwater with out suffering hypothermia and he felt he could last about an hour. Next they tested if they used an all natural blow gun how their aim would be. Tory and Grant made all natural ones but they accuracy was pitiful. Next, Carry who cheated by putting a metal rod in had perfect accuracy. Next she sat underwater and had to deal with the refraction of the water to hit the target. Eventually she go the hang of it. Next they tried to put all the aspects together breathing through it, being cold, and having to transfer the dart in. The myth was busted because no one could load the dart without shooting it with water. Back to Jamie and Adam they put their ninja to the test when he caught an arrow then they put him between three archers and at first he could not do it. Eventually when they moved back and the one who had to shoot had to draw his bow the ninja caught it. The next segment was supposed to be the one inch punch but we did not get to it. Thats it the next scrib is Matt Park

Watch the Ice MELT and then BOIL

Today in Mr. Liberman's class he started of by giving us five labs back that went on our semester 1 grade Next he handed out a calender of our continuation of Unit 7. Next he told us that there is a couple of Web Assign up for us to do. Also, he told us that the

question set for the second set of Unit 7 may not be done by paper, but by a Web Assign and he told us he'd give us his answer tomorrow. Then we switched seats and have new lab partners. Eventually we learned about our new lab format. Where we are given a sheet with less post-lab questions YES! and no pre-lab. It is a more organized format that helps us come to the conclusion of our labs better this lab was called Heating Curve Lab. The first part of the lab was to write the lab goal which in this case is to use a heating curve to determine the temperature at which a sample of ice melts and boils.

The procedure of this lab is as follows: First we obtained 150 mL beaker of crush iced which we took the initial temperature of, for my group it was -.02 degrees celsius. After we began heating it until it melted which was .1 degrees celsius because this is when the ice started to turn into water. Next we began checking the temperature of the water every minute until it began to boil which was 90.0 degrees celsius and after we raised the hot plate to the highest temperature for 3 more recoreded temperatures. Next we had to make a graph of our data so i made my like the photo above. You use your time as the x coordinate and temperature as the y. Next you had to do the percent error for your boiling temp vs. the actual which is 1oo degrees celsius. To do this you do 90.o + 273 (kelvin) -100.o + 273/ 373 which is -2.7 % error which is not but that is what my data states. This is correct because you do actual -theorectical/ theorectical. So my actual was 90 degrees because that is when ours began to boil. Then you do the same thing for melting so my group was .1 degrees celsius so you do .1 + 273 - 0 -273/ 373= .037 % error. You use 0 because that is the melting point of water. So to answer the first post lab question you give your own boiling and melting point of water. To answer the second you explain how you got it and, finally for the third you explain what you may have done wrong like in my case where I got -2.7 % error. Well that is about is the next scribe is Emillio I.

Can You Classify Chemical Reactions because I hope I can

Today and yesterday in Lieb's class we started off by talking about the 3 worksheets we need print off of moodle after this we began our class notes on the 5 types of reactions: Synthesis, Decomposition, Single Replacement, Double Replacement, and Combustion Reactions.

A synthesis Reaction is when you are given two reactants that combine to give you one product for example: 2H2 + 02 -----------> 2H20

A Decomposition Reaction happens when compunds are broken into elements or similar compounds. Example: 2H20 ---------> 2H2 + 02

A Single Replacement Reaction is when an element replaces another compound. These only take place in wate. Example: NaCl + F2 ---------> NaF + Cl2

A Double Replacement Reaction happens when one metal replaces another in a compound and the same for the non-metals. Example: AgN03 + NaCl ----->AgCl + NaN03

A Combustion reacion only occurs when a hydrocarbon reacts with oxygen gas. Example: C5H12 + 802 ------>5CO2 + 6H20

Now on to the Classifying Chemical Reactions Lab YES!!!!!!!!!!!

So, to begin with we went over the Pre-Lab in Question 1 we had to summarize the chemical reaction of sodium bicarbonate, carbon dioxide, and water. This turned into

2NaHC03-----> C02 + H20 + Na2C03. When balanced.

We then had two days to go through the 7 different stations and do all the experiments. In reaction 1 We Burned Magnesium ribbon. The Magnesium ribbon lit on fire and got chalk white after it burned. The chemical Reaction that occured was 2Mg + 02 ----> 2Mg0.

In the first picture we see the product of the Magnesium ribbon turning pure white and in the second it is lighting on fire.

In reaction 2 we put hydrochloric acid in a test tube with Magnesium Metal, and then we lit a wood splint and put it in the tube where it was extinguished. These turned into

2HCl+ Mg ----> MgCl2 + H2

The answer above has been balanced. In this picture we see the hydrochloric acid and Magnesium Metal Ribbon mixing and bubbles occuring.

In reaction 3 we put ammonium carbonate in the test tube an burned for 30 seconds then we put a piece of litmus paper at the top and an odor was released. This odor was amonia next we put a piece of wood flint on fire into the tube which was extinguished. The reaction for this was (NH4)2C03---> C02 + NH3 + H20 when balanced.

In this picture we see the mixture of amonia being released.

In reaction 4 we put calcium carbonate in a test tube with hydrochloric acid and once again lit a wood splint which was extinguished.

This reaction when balance became 2CaC03+ 2HCl-----> 3C02 + 2CaCl + H20.

In the second picture we see the wood splint being extinguished.

In the first picture we see the Calcium Carbonate and hydrochloric acid mixed.

In reaction 5 we mixed copper (II) Chloride and mossy zinc together and the mozzy zinc change color from silver to read. CuCl2 + Zn-------> ZnCl2 + Cu. When balanced.

In this picture we see the zinc changing color.

In reaction 6 we added copper chloride with sodium phosphate and a precipitate formed. When this reaction was balanced it became

3CuCl2 + 2Na3P04------> Cu3(PO4)2 + 6NaCl

In this photo you can see the precipitate forming.

In reaction 7 we mixed sodium hydroxide and phenolphthalein and the hydrochloric acid. During this reaction it at first became pink and then back to clear liquid color whise. In this reaction when balanced it became NaOH + HCl-----> H20 + NaCl As you can see in the pictures below it demonstrates the pink on the right and then clear again on the left

Well that was our class in a nut-shell and the coveted spot of scribing for Thursday goes to my man Josh D CONGRATS!!!

All Powerful Atoms

Representing Matter

View more presentations from gbsliebs2002.

Today in Mr. Lieberman class we started off the day with a quick congrats to Emilio on his post, and also talked about how to upload photos onto the blog. During the beginning of class a few students mentioned they forgot to do the ChemThink assignment Particulate Nature of Matter assigned the night before. So, Mr. Lieberman said if you could finish it before it was graded it would count as a full grade, so hurry to do it before he checks. Lastly, Mr. Lieberman collected all of the classes "Observation Labs". If you missed today’s class expect to turn it into to him tomorrow. Mr. Lieberman also notified us that our Web assign homework and safety tests were graded, and you can log on to see your grade. Next, we proceeded to take notes on our first unit. These notes included the fundamental unit of Chemistry the Atom. Also, in the notes we went over elements, molecules, and compounds for example Splenda or, Sweet and

Low. First of all an element is the simplest of pure substacnes. Which, brings us to what a pure substance is. A pure substance is a substance made out of all the same elements or compounds or mixtures. For example gold. Also, a pure substance cannot be seperated into smaller substances. We also learned about compunds. Compounds are a molecule that has two different kinds of atoms in it like oxygen and hydrogen. Next, we learned about mixtures which, are compnents that retain their own identity, and can be seperated physcially. Mr. Lieberman taught us an acronim to learn the 7 different diatomic elements (diatomic means two atoms,) HONClBrIF. This stands for Hydrogen, Oxygen, Nitrogen, Chlorine, Bromine, Iodine, and Flourine.

We also learned about pure substances, classification, mixtures, Homogenous mixtures, and Heterogeneous mixtures. During the notes Mr. Lieberman told us a few fun facts for instance we learned that lead's Latin name is plumbum. So, plumbers got their name when they worked in Rome on the aqueducts, which used lead. The class notes are represented above this blog post.

After this we began our Paper Clip Activity. In this activity we had to use colored,

small, and jumbo paperclips to compose atoms. We were given a partner to complete all of the atom molecule combination problems, and then Mr. Lieberman had checked off our your creations. There are five sample questions to complete for homework tonight.

Finally, Mr. Lieberman assigned us a Pre-Lab for tomorrow’s lab "Separating Mixtures". Make sure you get that done for tonight’s homework. The next scribe shall be Aaron G