Final blog

My final blog. I have finished my report and have added more onto my mindmap. Im finished! (On Monday I changed from plastic to bone)

Science Project -Blog Entry 7

These are 3 pictures I took during my experiment.

Picture 1 : Shows plastics in the drink and pH paper.
Picture 2 : Shows drinks.
Picture 3 : Shows results of the pH paper.


Here is a table of my results

Type of Drink pH Length of bone Initial bone length = 5cm Appearance Coke 4 4.5cm Change color – went dark brown Solo 3.5 4.4cm Decayed – went brown Fanta 5 4.6cm Change color – went orange Orange Juice 3.5 4.4cm Went orange and yellow Lemonade 3 4 cm Became light yellow

Here is a graph of the pH levels of the drinks.
Here is a graph on the results in bone length
Here is a discussion of my findings

Discussion

Discussion

The trends and patterns found in my experiment were that juices are more acidic than soft drinks. A drink such as solo which has traces of lemon (5%) has shown to be still acidic with a pH of 3. The findings also show that the high pH drinks (lemonade, solo, orange juice highly affected the bone compared to the other drinks (fanta, coke,) which did not affect it as much. These drinks also had a pH of 4-5. Basically this means that the drinks with lower ph (acidic) can break down more of the bone than higher ph drinks.

The errors and weaknesses I made in the experiment were that I used a thick bone that did not show a great effect on coke or fanta. Another weakness that affected the test was using a pH paper with a smaller scale than usual.

If I repeated this experiment another time I would choose to improve the experiment by changing the material to something more thin and weak because the bone I used was far too strong giving small results and I should have left the experiment for more than twelve hours and changed it to 24+ hours. I would’ve also used a different pH paper which went from 1-14pH.

I believe my experiment was very reliable because after repeating the experiment I obtained the same results. Validity was proven by keeping the dependant variable the same throughout the experiment. But I should have used a different pH paper, one that would show answers from 1-14pH because some of the drinks could’ve been either higher or lower and this is why I believe the accuracy of the experiment wasn’t 100%. But the results did show a pH that matched the scale so I believe it was still correct (if it didn’t it would have showed a different or no color at all).

From the results our findings indicate that Lemonade and Solo had the lowest pH reading of 3 thus making it the most acidic and Fanta had the highest pH reading of 5, making it the most neutral.

The results also show that Orange juice and lemonade were the most effective on the bone and famta was the least effective on the bone.

After being in the drinks for 12hours, Lemonade had reduced its bone in size by 1cm.The other drinks reduced the bone by:

Coke - 0.5cm

Solo - 0.6cm

Fanta - 0.4cm

Orange Juice 0.6cm

After looking at the bone i saw a change in color from the bones.

Coke - Became Dark brown

Solo - Decayed and became brown

Fanta - Became orange

Orange Juice - Became orange and yellow

Lemonade - Became light yellow (mostly white still)

My experiment matched the hypothesis because Lemonade had the strongest acidity and was one of the strongest in breaking down the bone. I believe the results were like this is because a lemon actually has 138 mg (3%) per 100g of phosphoric acid in the fruit. This is a lot more than coke. Though solo was also equal with the lemonade but did not affect the bone.

Science Project -Blog Entry 6

So far I have almost finished my experiment (Results will be posted in the next Blog entry).
I have just put the plastics into the cups and now I have to wait eight hours until i can see the results. I have almost completed my science report with only the discussion, results, and conclusion left to finish.

Here is a timeline of my SRP.
Week 1 : -Away-
Week 2 : After receiving the notification I started thinking of ideas though i was unsure.
Week 3 : I decided to do my SRP on testing out if normal coke was heavier or lighter than coke zero.
Week 4 : I did my research and decided to weigh the drink. But then I didn't really find anything interesting about that because all i had to do was measure two cans, and I was done.
Week 5 : I came up with another idea to measure the two drinks. I put both drinks in water and see which would float and sink and time that.
Week 6 : -Nothing-
Week 7(Holidays) : Decided to change the experiment, and so I restarted by blog and re-thought everything.
Week 8(Holidays) : Started to work on what to do and I chose testing the acidity of soft drinks and juices.
I was inspired to do this because I visited the dentist the past week and they told me soft drinks are really bad for teeth, so I wanted to see if juices were too but in an interesting way.
Week 9 (not yet passed) : I conducted the experiments. I will record the results publish them and then submit my report.

Science Project -Blog Entry 5

My report
Experiment!
Aim
To test the acidity of popular soft drinks such as coke, fanta, sprite, solo and compare them to other drinks such as fruit drinks and also see the if the high acidity drinks will break down solids.

Equipment : pH paper, pH reference chart, different drinks (ranging from soft drinks to fruit drinks), container, metal, plastic.

Method
1.Pour your drinks all marked in a separate beaker.
2.Remove one strip of the pH test paper.
3.Hold one end of the test strip between the index finger and thumb.
4.Dip the test strip into the solution to be tested for about 1-2 seconds.
5.Shake off excess liquid.
3.Compare the color of the results to a reference chart.
4.Record the results
5.Repeat the experiment for all the drinks.

Experiment 2
Method
1.Pour your drinks all marked in a separate beaker.
2.Place a piece of the thin metal into the solution.
3.Wait for eight hours.
4.Retrieve the metal from the drink.
5.Observe the effects and record these in a table from no effect, minimum effect, major effect, or completely gone.
6. Repeat the experiment for all the drinks.

Hypothesis
Soft drinks will be the most acidic.

Science Project -Blog Entry 4

Experiment 1

Method
1.Pour your drinks all marked in a separate beaker.
2.Remove one strip of the pH test paper.
3.Hold one end of the test strip between the index finger and thumb.
4.Dip the test strip into the solution to be tested for about 1-2 seconds.
5.Shake off excess liquid.
3.Compare the color of the results to a reference chart.
4.Record the results
5.Repeat the experiment for all the drinks.

Experiment 2
Method
1.Pour your drinks all marked in a separate beaker.
2.Place a piece of the thin metal into the solution.
3.Wait for eight hours.
4.Retrieve the metal from the drink.
5.Observe the effects and record these in a table from no effect, minimum effect, major effect, or completely gone.
6. Repeat the experiment for all the drinks.

Science Project -Blog Entry 3

Experiment 1

Equipment : pH paper, different drinks (ranging from soft drinks to fruit drinks),
Dependent Variable : Color change then compare it on the pH paper.
Independent Variable : Type of drink.

Experiment 2

Equipment 2 : Cups, different drinks (ranging from soft drinks to fruit drinks), plastic, paper, metal
Controlled Variable : Cup, amount of liquid and material.
Dependent Variable : Effect the liquid has on the material.
Independent Variable : Type of drink, type of material

Im unsure if I should do experiment 2 though because it does look more interesting but the way of collecting the results which is basically just looking at them is not that reliable.

Science Project -Blog Entry 2

Research
There actually have been alot of people who have done similar experiments like to investigate teeth decay.
I have also visited a few sites and read about people using these types of drinks to corrode metal though they have left the metal for a few days with the drink.

Acidity
pH is the measure of acidity which range from 0-14 (1 being the highest).
0-7 = Acidic.
7+ = Non Acidic (Neutral).

Drinks
Soft Drinks - Coke(this can also include different cokes such as diet coke) , Solo, Fanta, Sprite,
Fruit Juices - Orange, Apple, Lemon, Tropical Punch


Things To Do.
1. Get pH paper
2. Set up the experiment (this means getting the equipment, plan the method and aim).
3. Write the report.

Question From looking at this picture It looks like fruit juices such as lemon and orange will far more acidic than the other drinks.