Kyle+K

Question- Will the mass of a bolt decrease from its original mass if it is left in Coca-Cola for a period of time?

Hypothesis- If steel bolts are left in Coca-Cola for a period of time then because of the level of acid in Coca-Cola the bolts mass will decrease.

One Day Trails Two Day Trials
 * Bolt # || Original Weight || End Weight || Difference ||
 * 1 || 6.04g || 6.04g || 0g ||
 * 2 || 6.13g || 6.12g || -0.01g ||
 * 3 || 6.04g || 6.04g || 0g ||
 * 4 || 6.04g || 6.04g || 0g ||
 * 5 || 6.09g || 6.09g || 0g ||
 * 6 || 6.13g || 6.14g || +0.01g ||
 * 7 || 6.14g || 6.13g || -0.01g ||
 * Bolt # || Original Weight || End Weight || Difference ||
 * 8 || 6.03g || 6.04g || +0.01g ||
 * 9 || 6.16g || 6.16g || 0g ||
 * 10 || 6.05g || 6.06g || +0.01g ||
 * 11 || 6.07g || 6.07g || 0g ||
 * 12 || 6.09g || 6.08g || -0.01g ||
 * 13 || 6.06g || 6.07g || +0.01g ||
 * 14 || 6.06g || 6.06g || 0g ||

Three Day Trials Four Day Trials Five Day Trials Six Day Trials Seven Day Trials
 * Bolt # || Original Weight || End Weight || Difference ||
 * 15 || 6.05g || 6.03g || -0.02g ||
 * 16 || 6.09g || 6.04g || -0.05g ||
 * 17 || 6.04g || 6.07g || +0.03g ||
 * 18 || 6.03g || 6.03g || 0g ||
 * 19 || 6.05g || 6.05g || 0g ||
 * 20 || 6.05g || 6.06g || +0.01g ||
 * 21 || 6.04g || 6.04g || 0g ||
 * Bolt # || Original Weight || End Weight || Difference ||
 * 22 || 6.12g || 6.12g || 0g ||
 * 23 || 6.02g || 6.02g || 0g ||
 * 24 || 6.06g || 6.06g || 0g ||
 * 25 || 6.05g || 6.04g || -0.01g ||
 * 26 || 6.04g || 6.04g || 0g ||
 * 27 || 6.14g || 6.14g || 0g ||
 * 28 || 6.04g || 6.04g || 0g ||
 * Bolt # || Original Weight || End Difference || Difference ||
 * 29 || 6.18g || 6.20g || +0.02g ||
 * 30 || 6.05g || 6.05g || 0g ||
 * 31 || 6.10g || 6.10g || 0g ||
 * 32 || 6.01g || 6.02g || +0.01g ||
 * 33 || 6.13g || 6.14g || +0.01g ||
 * 34 || 6.05g || 6.06g || +0.01g ||
 * 35 || 6.15g || 6.15g || 0g ||
 * Bolt # || Original Weight || End Weight || Difference ||
 * 36 || 6.05g || 6.07g || +0.02g ||
 * 37 || 6.05g || 6.06g || +0.01g ||
 * 38 || 6.06g || 6.06g || 0g ||
 * 39 || 6.04g || 6.06g || +0.02g ||
 * 40 || 6.04g || 6.04g || 0g ||
 * 41 || 6.08g || 6.09g || +0.01g ||
 * 42 || 6.05g || 6.07g || +0.02g ||
 * Bolt # || Original Weight || End Weight || Difference ||
 * 43 || 6.04g ||  ||   ||
 * 44 || 6.07g ||  ||   ||
 * 45 || 6.05g ||  ||   ||
 * 46 || 6.02g ||  ||   ||
 * 47 || 6.03g ||  ||   ||
 * 48 || 6.05g ||  ||   ||
 * 49 || 6.06g ||  ||   ||

11/6/10 - 2 day trial Room temp. coke measured to 2oz. per cup and bolt Started at 5:10a.m. Bubbled at the top when dropped in.

11/7/10 - 1 day trial, Started at 5:50 a.m. Bubbled at the top where it was dropped in.

11/7/10 - 2 day trial Soda was still and flat. Hard to see the bolts # 8 and 10-14. #9 had little bubbles attached to it.

11/8/10 - 2 day trials,
 * 8,10,14 no visible changes
 * 1) 9 head of bolt is brown not black
 * 2) 11 outer layer of head is eaten away
 * 3) 12 small areas on head are eaten away
 * 4) 13 parts scattered all over the bolts are brown

Brown stain was left on the bottom of all of the cups

11/8/10 - 1 day trial
 * 1,3,4,5,6 no visible changes
 * 1) 2 entire head is grey and not black
 * 2) 7 scattered grey spots on the head



__Science Fair Materials List__ - 49 nonplated steel bolts, all the same size - 98oz. of Coca-Cola, 2oz. per bolt - Ruler to find the dimensions of the bolts - Digital scale to weigh the bolts to make sure they all weigh the same before the experiment. Weigh again after to see how much they have broken down. - Thermometer to monitor the temperature in the room where I am doing the experiment. - Liquid measuring cup in oz. to measure the Coke - Plastic cups to hold the bolt and soda. - Digital clock to keep the time of how long the bolts should be in the soda. - Tongs to remove the bolt from the soda so it is not touched. - Plastic bags to transport the bolts to and from school to weigh them. - Pencil and paper to record

__Science Fair Procedure__ 1. Weigh all of the bolts on the scale to make sure they all weigh the same. 2. Sand the bolts if their weights are extremely off. 3. Record the weight of all of the bolts. 4. Measure out 2 oz. of Coca-Cola and pour it into a plastic cup. 5. Add a bolt to the cup of soda. 6. Set a clock so you will remove the bolt in 1 day. 7. Remove the bolt using tongs in when the time is up. Put it in a bag and label it 1 day. 8. Take the bolt in the bag to school and weigh the bolt again. 9. Record the weight of the bolt. 10. Repeat steps 4 and 5 11. Repeat step 6 but each time add another day. So I will have 7 experiments, increasing by a day in length each timemaxing out at 7 days. 12. Repeat steps 4-11 for a second set of data.