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Mass Loss Experiment

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Analysis of Mammal Tooth Mass Loss in Laboratory Phosphoric Acid Results from the experiment of soaking tooth in phosphoric acid (Table 6 and Graph 1) show a very weak positive correlation between the concentration of phosphoric acid and percentage mass loss in each tooth. Initially from 0.1M to 0.3M, there is a sharp increase in percentage mass loss of tooth soaked within these solutions, however, as seen from the graph, the percentage mass loss of tooth within 0.4M and 0.5M starts to decrease steadily. The data points combined together almost show a parabolic relationship between the two variables. The R2 value is less than 0.5, suggesting a non-linear relationship between the two variables. Below will be an explanation of each reasons …show more content…

The difference between diluted and concentrated acid is the ratio of acid molecules to water molecules within the solution. In diluted acids, there are lesser acid molecules relative to water molecules, and vice versa for concentrated acids. However, diluted acids will disassociate into H+ ions more readily than concentrated acids, where as concentrated acids will have acid molecules within the solution and not its ions in dissociated form, because water acts as an ionization medium for acid molecules (O’Leary, 2000). In addition, fewer ions within the solution means there are more space for solutes to occupy within the solution, thus, increasing the solubility of solutes within the solution and/or allow H+ ions within the solution to react with more solutes. These two factors can collectively contribute to the corrosiveness of an acid, therefore, diluted acids can cause greater corrosive damage to a substance as the presence of water molecules can aid the dissociation of acid molecules into its ions and there is greater capacity for solutes and H+ ions to …show more content…

The error bars on the graph show little overlapping of data, indicating that the data are somewhat reliable to a large extent. Analysis of Mammal Tooth Mass Loss in Coca Cola Results show a negative correlation (Table 7 & Graph 2) between concentration of Coca Cola and the percentage mass loss in each tooth. Looking at each individual data points, although the points may not all lie on the line of best fit, however the percentage mass loss in 20% is the highest amongst all the other points, while being lowest concentration within the experiment, therefore, supporting the argument that there is a negative correlation between the two variables. The R2 value is less than 0.5, suggesting a non-linear relationship between the two variables. 2.1) Material Deposited on

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Acids are proton donors in chemical reactions which increase the number of hydrogen ions in a solution while bases are proton acceptors in reactions which reduce the number of hydrogen ions in a solution. Therefore, an acidic solution has more hydrogen ions than a basic solution; and basic solution has more hydroxide ions than an acidic solution. Acid substances taste sour. They have a pH lower than 7 and turns blue litmus paper into red. Meanwhile, bases are slippery and taste bitter.

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Now since p-value is greater than the significance value, then the hypothesis is considered rejected. It therefore negates the claim that the mean number of ounces in each bottle is less than sixteen (16) therefore it is not true. It therefore follows that the customers’ complaints may be right but not all soda bottles have less than 16 ounces each as it may be claimed. There is need for appropriate measures to be taken by ensuring that the right number of ounces are in each bottle of soda.

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Strong acids and strong bases are strong electrolytes and are assumed to ionize completely in the presence of water. Weak acids however, only ionize to a limited extend in water. Any weak or strong acids when in contact with any weak or strong alkali will start to undergo neutralization regardless of their volume. When an indicator which is present in the acid-base mixture and have experienced colour change, it indicates that the mixture is in right proportions to neutralize each other and is also known as the equivalence point.

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These are particularly noteworthy in Mountain Dew, which, in two of the five trials, resulted in a mass gain of the teeth. This is also present in Trial 2 of the Pepsi. It was first assumed that the mass gain was due to the mass of the soft drink still on the marble chips, but after measuring them again the next day after allowing them to dry out, this theory was not supported. It is more likely that the initial mass of the marble chips were incorrectly noted, which resulted in incorrect data. Furthermore, both Coke and Fanta had a drastic difference in their highest and lowest percentage mass loss, with Coke’s greatest difference at 9.23% and Fanta’s at 8.18%.

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