Our group would like to know under what level of pH/Molarity would create the optimal conditions for the corrosion of iron. Our group will be using iron as it is commonly used for making of the ship's hulls. In the sea, there are different acids, hence we will be using the acids- Hydrochloric Acid, Sulphuric Acid, Citric Acid. Our aim is to see if the lower the pH value the acid, the higher the corrosion rate. Our solution is to carry out an experiment that can help us find out which acid is the most acidic out of the three and whether the concentration and the pH value of the acid will affect the rate and severity of corrosion. Before we start the experiment, we will weigh the iron angle as the original weight is part of the final calculation. After our multiple tests, the results we have achieved from the experiment conducted shows that within the same amount of time, with the same amount of acid use for each test and the amount of surface area exposed to the acid. Sulphuric acid is the acid which has the highest rate of rusting compared to Hydrochloric acid and Citric acid for both molarity 1 & 2. Therefore we can conclude that sulphuric had the highest rate of corrosion as it has the lowest pH value compared to the other 2 acids and the higher the molarity value. Thus, the pH value of an acid is inversely proportionate to the rate of corrosion of the iron plate. From our experiment, we can see that the higher the molarity, the lower the pH value, the higher the corrosion rate. Hence, we can use this experiment and apply it to real life as some ships use iron and when it sails, the iron will also be exposed to the seawater which contains many different acids, making the ship prone to rust. However we do realize that the pH levels of the acids found in the seawater are much higher than the ones that we used in our tests but our reason for using such low pH leveled acids is to simulate a accelerated rate of rusting, as we do not have years(rate of rust is calculated in years) to rust our materials so we have to accelerate the rate of rusting to be able to complete the project on time.

The process of this experiment consists of us leaving the iron angle in each acid (Molarity 1 and 2)  for 25 hours and 40 minutes. 
After the iron angle has rusted, we will be weighing it again. Our final calculation will be:

 (original weight - new weight after rusting)
1540 minutes

After that calculation, we will get our results.

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