Synthesis

• Two or more substances combine to form another more complex substance.

A+B-->AB

Decomposition 

• One substance breaks down into two or more simpler substances

AB-->A+B

Single displacement

• Occurs when one element replaces another element in a compound 

A+By---> Ay+B

Double Displacement 

• Two different atoms in two different compounds exchange places 

Ay+Bx--->Ax+By

Combustion

• A hydrocarbon reacts with oxygen 
• The products of combustion are always water and carbon dioxide
• Hydrogen + Oxygen

----> water+carbon Dioxide 

When we lit the steel wool on fire it was an example of synthesis 

Fe+ O2+fe O3

An example of Decomposition is when the baking soda was heated 

NaHCO3------>H2O + Co2+ NAOH

an example of single displacement is the nail in sulfate

FG+CCuSOU----->CU+FE2(SO4)3

Flame Test Lab

This past week we have been working with flames and and testing there color changing patterns with chemicals. During the flame test we used a piece of wire with the end formed as a loop.To clean the wire, we had to dip the end in the concentrated hydroelectric acid and then we were assigned to put the wire in the flame. Each station had a different chemical and we had to take notes on the different colors that each chemical made.

  Chemical Formula              Name of Metal       Color Produced
         Nn                                 Mncl                         Green, Orange, Blue                                                              Sr                                  Sr(no32)                    Pink, red
         CN                                CNc/2                       Blue, Green
         CO                                Coci2                        Orange
         Mg                                 Mgcl                          Blue, green, orange, red
         Blt                                  Ba(.no3)                    Green, Yellow, Orange


Questions to answer

1. Not cleaning the metal rod in the Hydroelectric acid, and also Not getting enough of the chemical that is there to test onto the metal wire.
2. By them not showing any color when you put it into the flame.
3. You need to look at more then one piece to get the answer.
4. By the chemicals burning and them letting off the color as they are being burned. One the chemical gets to a certain heat it starts to light a of a color as it burns
5. strawtheium,lithium,  violet would be last because it has the highest energy.
6. Because they have to get to a certain temperature before they let of the color. 

law of conservation of mass

This past week we have been working with chemicals and finding the mass for each of them. the chemical reaction took place when the liquid started to turn white. when we took our third observation the chemical started of as purple but when we added the chemicals the liquid turned clear. the mass of the reactants was the same as the mass of the products. Yes, the mass has been conserved

Where do elements come from

Elements of the world came from hydorgen gas which is in clouds. The universe is about 95% hydrogen. CLouds of hydrogen gas and dust are comprssed by gravity into stars, which, by the process of nuclear fusion,change a one-proton hydrogen nucleus into a two-proton helium nucleus. Elements came from the nuclear fusion which take place at the cores of stars. The nuclear fusion in the stars also is a bug reason why there are elements here on earth. All Liquids,gases, and solids found on our planet are made from or more of 92 naturally occuring elements. From what they have observed, scientists have determined that these same 92 elements are found throughout our universe. This suggests that a common process leads to their creation. Elements come from a lot of things that go around the world.

copper chloride lab

Proper scientific technique  requires careful observations to make conclusions. This past week we have been working with copper and chloride mixed together. Here the observations that we took.

1. the first observation that we noticed was that the copper chloride was a solid
2. next we established that it was a poison
3. the color of It was green/blue
4. it is dangerous to work with
5. fragile
6. soft
7. clumpy
8. once we poured it into the water it turned green
9. as it spread out in the water it was grey/white
10. It slowly dissolved
11. top of the cup was green and so was the bottom
12. middle was still whit/grey
13. particles of the powder was floating around

Put the tinfoil in:

1. the tinfoil turns black
2. bubbles started to form
3. tinfoil starts to dissolve
4. the tinfoil then starts to fall apart
5. water stays the same
6. the tinfoil goes from black to dark red
7. little parts of the tinfoil are still silver
8. blackish/reddish pieces start to fall off
9. the tinfoil rips in half
10. fell completely apart
11. once it fell apart it started to float
12. the tinfoil is completely red now
13. water changes color and is blueish/black

Sat over night- Next Day:

1. liquid is pale blue
2. looks like sand on bottom
3. if you pick glass up and look at the bottom of it. it is dark purple/brown
4. turns white when u mix it
5. it was white and then turned blue when we added the acid
6. bubbles started to shoot up
7. started to sizzle
8. red powdery ball at the bottom
9. powder on sides is green
10. everything seems to dissolve

oreo cookie lab

Oreo Cookie lab Brandon,Pentucket High school Lab conducted September,12 2013 Students measured the filling in three types of Oreo cookies to determine if filling amounts matched advertising. What we did in this lab was we measured the mass of Oreo cookies cream filling. Once me and my partners put the cream filling on the scale we were testing too see if the cream filling was really twice the amount of the original amount. The results that me and my partners got was the original stuffed cookie was 3.4 grams and the double stuffed cookie was 7.4 grams. Once me and my group got too the mega stuffed cookie we were already convinced that the advertisement was true, and the mega stuffed cookie ended up being 10.65 grams so the advertisement was true. Elements planets cars disney prezid original: 2.2-1 3.4 3.2 3.2 original/original=1 Double 5.2-2.3 7.2-2.1 6.8 6.34 original 5.2/5.2=2.36 stuffed Mega stuffed 8.25-3.7 10.65-3.1 9.5 9.74 original 8.25/2.2=3.75

scientific observations lab

gummy bear

Over this week we did alot of things that taught me how to do specific things in the lab. One thing that we did this week was we had to measure the mass and find the volume of a gummy bear. After we found the mass and volume of the gummy bear we were assigned to put the gummy bear into a glass of water so that the next day we could see if it had dissolved. i found that to be very interesting and also it taught me how to find that mass and the density of small objects. Another thing that we did this week was the do nows that we were assigned every day before class. The do nows helped me figure out the mass, density, and the volume. If it werent for the do nows that we have been doing all this week i dont think i would be able to figure out what to do in the lab when i was trying to measure the gummy bear and find the mass for the bowling ball.

Why we study science

 

Why We Study Science

 

The reason why I study science is because I need to take a science class in order to graduate from high school. Also I am excited to be working hands on in class with cool experiments. Another reason why we all study science is because we all need to learn about what goes on in the world. If you think about it everything you look at in the world has something to do with science so it is important that you take the class science. Science is also important because it helps you understand what goes on in the world.