Thursday, February 28, 2013

Combining Solutions of Ionic Compounds Lab Report


Combining Solutions of Ionic Compounds


 
Purpose:  To find out how the properties of acids and bases be used to classify solutions.
Materials: -4x6 spot plate
-Masking tape
-Solutions A,B,C, and D (some are corrosive)
-4 Pieces of Mg ribbon
-4 Pieces of red litmus paper
-4 Pieces of blue litmus paper
-Bromothymol blue solution
-Indigo carmine solution
-Methyl orange solution 
          

Procedure:  The procedure used was from the BC Science 10 textbook on page 230

Results:
Mg Ribbon
Red Litmus
Blue Ribbon
Bromothymol
Blue
Indigo Carmine
Methyl Orange
Unknown
Began to bubble somewhat quickly, bubbles formed on the bottom.
Red paper, but the solution looks blue
Nothing
The solution turned yellow
The solution turned blue
The solution turned red
A
Nothing
The paper was blue
Nothing
The solution turned royal blue
The solution turned dark green
The solution turned yellow orange
B
A few small bubbles
The paper was red
Nothing
The solution turned green
The solution turned blue
The solution turned yellow orange
C
A few small bubbles
The paper was blue
Nothing
The solution turned light blue
The solution turned  blue
The solution turned yellow orange
D



Discussion
Analyze:
From most acidic to most basic I think is A,C,B,D.  I am not certain as I really am not confident with my results. Even with this, I believe that the neutral solution was C.  I believe that the most alkaline solution was solution B. My reasoning is that it was the only solution to not react at all with the Mg ribbon and it reacted with the liquid indicators as well. The ribbon was useful for testing the pH as acids would react with it to produce a salt and hydrogen gas. The gas then was able to bubble in the solution.
Conclude and Apply:
If there was a pH of 3 in a solution, the indicators would be red. If there was a pH of 10, the indicators would be blue. If I needed 3 tests to see if a sample was acidic, neutral, or basic, I would use red Litmus paper, blue litmus paper, and an alkaline earth metal. My reasoning is pretty obvious for the litmus paper as it would give a pretty instant reading. The metal would be good confirmation if the sample was acidic as it would react. For the colour of the Roccella tincoria being dipped in vinegar, my educated guess would be that it turns red. This is because vinegar is acidic. To find out the colour of seawater with Bromothymol blue added to it, I needed to find out the pH of seawater. I learned that is a little bit basic. And when Bromothymol blue reacts with bases, you get a dark blue colour.

Conclusion
This experiment was interesting. I think that the results we got however were off. They were different than the other group we worked with. However, we were able to clearly identify the acid thanks to the liquid indicators, litmus, and the magnesium.  Another problem we had was the beakers with solution were not properly labelled, so we weren’t 100% sure which solutions were A,B,C, and D.

Tuesday, February 5, 2013

Building an Atom

Download my Word Doc:

http://www.mediafire.com/view/?ydk2fxd7qbfnn01

Sunday, February 3, 2013

WHMIS Symbols


Workplace Hazardous Materials Information System

https://docs.google.com/document/d/132mtlao_JdXJ9dz8-VZunh1EdqiRanXvTTcWwrL45t4/edit?usp=sharing

Scientific Method Worksheet

https://my43.sd43.bc.ca/schools/Riverside/Classes/fbdc2b5b-182c-4090-953b-9d5a0b1bc809-defaultaspx/science10DI/Mr%20Taylors%20Documents/Scientific%20Method%20WS.pdf


1) The scientists assumed that there was no life on Mars because the broths did not produce as much carbon dioxide as it would have on Earth.

2) The scientists got soil from different parts of the Martian surface so they would be able to not only compared results with what happens on Earth, but the other part of Mars as well.

3) Micro organisms were the characteristic of life being tested for in this experiment.

4) Scientists found the evidence from this experiment to be inconclusive. The only way to be sure that life exists on Mars would be to find living proof of it.