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Dude where's my boat?

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Kaitlin Jones

on 28 October 2014

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Transcript of Dude where's my boat?

Dude where's my boat?
Algae Killer
by: David, Kaitlin, and Carey
Algaecides are biocides used for killing and preventing the growth of algae. In our experiment the copper chloride acted as the algaecide. The brown flaky stuff in the boat was the copper from the copper chloride. When Uncle Jim allowed Zed and Sarah to put his aluminum boat into the pond that contained algaecides (like copper chloride) he took the risk of the algaecides corroding his boat. The reason that the algaecides did not affect the boat the second trip is that after it rains the algaecide's affect wore off because of the introduction of new water (and algae).
2nd period

what's up with the water?
The pond water was that crystal blue color because Uncle Jim added algaecides to get rid of the algae make the water that pretty blue color.Pond water got into the boat because the algaecides put in the pond ate away the aluminum boat. The aluminum was not a strong enough metal to resist the copper chloride inside the algaecides.
We tested the vast amount of algaecides and conducted what exactly would happen to aluminum when it reacts to copper chloride, we discovered that corrosion occurred and the aluminum was lost to the hands of mother natures wrath.
2Al + 3CaCl--> 2AlCl3 + 3C4
Aluminum end up being the limiting reactant
The reaction worked the first trip and not the second trip due to the rain. With the new water it introduced new algae into the water.
Fe + CuCl2 --> Cu + FeCl2
mass of Iron: 0.5g
30mL of water
Copper Chloride: 3.36g
W/O weigh boat: 1g
Mass of weigh boat: 2.36g
After dissolving CuCl2: light blue
After adding metal: nothing
After stirring for 10 min: no change, no heat.
SHort and Long term affects on Aquatic life
Sn + CuCl2 --> SnCl2 + Cu
30 mL of water
mass of tin: 0.35g
mass of CuCl2: 3.36g
W/O weigh boat: 1g
mass of weigh boat: 2.36g
After dissolving CuCl2: light blue
After adding metal: nothing
After stirring for 10 min: cloudy blue, no heat.

Short term: consist of Excessive runoff, Shallow areas, and Low amounts of good bacteria
Long term: Management of algae involves nutrient reduction to the water body, also can be costly and take many years.
What metal worked the Best?
Iron worked the best because it resisted replacing the copper due to the activity series of metal referring to the chart below.
Why We use Aluminum
It is more affordable and we add marine grade alloys.
Magnesium (Mg) and Silicon (Si) are the two alloys used.

Through this boat project we have learned why boat makers make their boats out of the materials they do. We learned that although Iron is resistant to Algaecides we couldn't make a boat out of Iron because the material is too heavy. Tin held up well against algaecides in our test and is used by many companies to make boats. Although aluminum had an extreme reaction to our algaecide boat makers often add a protective coating to aluminum boats to prevent a reaction like uncle Jim's boat. Overall we have learned that there are more factors to take in to building a boat besides brand, you need to think about price, weight, and metal reactivity.
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