# Chemistry 11 – Reactions Lab

Station #1 (Before the burning)

https://onedrive.live.com/?authkey=%21AKeGaP%5FOP7bpNuo&cid=4DC74A509B1EA836&id=4DC74A509B1EA836%214258&parId=4DC74A509B1EA836%21413&o=OneUp

(Burning of steel wool)

Station #2

(Butane burner being lighten up for 5 seconds)

Station #3

(The whole reaction)

Station #4  (5 minutes after adding the solution)

Station #5 (Before solutions are mixed together)

(After the two solutions are mixed)

Station #6 (The solutions and the litmus paper we used) (Solutions without the litmus paper) (With litmus paper) (Mixed with litmus paper)

# Week 17 – Math 10

This week in Math 10 we learned about arithmetic series and how they relate to arithmetic sequences. For example arithmetic sequences are a list of number that either add or subtracted by a certain number. 2, 4, 6, and 8 is an arithmetic sequence since you must add 2 to each number.

Now arithmetic series are similar to arithmetic sequences. For example 1+2+3+4+5+6 is a arithmetic series. This is because if you add the 1st and the last number (1 and 6) it equals 7. Then the second and second to last number also equals 7 (2+5).

Here is the formula for arithmetic series. Step #1

For example the series of numbers you are given is 2+3+4 and so on, the term you’re trying to find is 24. The first thing you must do is find out what number is term 24, this is where learning how to use arithmetic sequences helps. Step #2

So now we know that the 24th term of this series is 25, we can use our new formula and just plug everything in. Step #3

Now just let algebra take over. This means that in this series, if you were to add all the numbers 2 through 24 together. It would total to 324.

# Week 16 – Math 10

This week in Math 10 we learned about arithmetic sequences. Arithmetic sequences is a pattern of numbers that are either added or subtracted by the same number.

For example 2, 4, 6 and 8 are all added by 2. Now you may be wondering what a term is, well there is a simple answer. So 2 is the 1st term of this sequences, while 4 is the 2nd term, 6 is the 3rd term, 8 is the 4th and so on. There are many different ways to use arithmetic sequences, but first you must know the formula. Step #1

For example your arithmetic sequences is -3, -1, 1, 3 and so on, the questions asks you to find the  50th terms of the sequences. First you need to plug the numbers into the formula. Step #2

Now as Ms. Burtons says just let algebra take over. So after you’re done solving this equation, you should get 95. This means that the 50th term in this sequence is 95.

# Week 15 – Math 10

This week in Math 10 we learned how to solve systems using substitution.

Step #1

First you need two systems of a line because you cant solve a system of two lines if you only have one.

For example you could have

x-2y=10

x+5y+4=0

Step #2

Now you must choose one the equations to rearrange so that either the x or y is on the other side of the = sign. For example you want the x in x-2y=10 to be on the other side of the = sign. Now it doesn’t matter if you choose x or y, just remember its easier to move the x or y if it is attached to a 1.

So if I choose to rearrange x-2y=10 is will become x=2y+10

Step #3

Now you just take to second equations and substitute in the x (get it, this is why its substation). This is what your equation will look like

1(2y+10)+5y+4=0

Now you just let algebra take over. And you get the answer -2.

Step#4

Now you cant leave it just like that, since you’ve only found the y of the equation. You still must find x, but don’t worry its super easy. Just take the new equation you made x=2y+10 and replace the y with the -2. Since we now know that y=-2. The equation should now look like this.

x=2(-2)+10

Once again just let algebra take over. Step #5

Last step is two put our two new numbers as points on a graph, which would be (6,-2) are done. Then you’re done, its super easy once you get the hang of it.