why would the concentration of ascorbic acid decrease as the temperature rises? Also is there any reason that the concentration would drop suddenly at 30 C then go back up and continue to decrease evenly. ( i repeated these 3set titrations 3 times and all were concordant but lower than 20C and 30C.
If i could have deatailed info it would be greatly appreciated thanks.
It would help if we knew the details of the experiment. As it is I'm in the dark.
the details of the experiment were to find out how temperature affects ascorbic acid by doing titrztions then to write a report about it all of my titrations were concordant it was only at 30 C I was getting weird results
The concentration of ascorbic acid (also known as Vitamin C) may decrease as the temperature rises due to its inherent chemical properties and some external factors. Here's an explanation of why this happens:
1. Chemical degradation: Ascorbic acid is a relatively unstable compound that can undergo chemical degradation at higher temperatures. This degradation process occurs more rapidly with increasing temperature, causing the ascorbic acid molecules to break down into other compounds. This breakdown leads to a decrease in the concentration of ascorbic acid in the solution.
2. Enhanced reaction rates: Higher temperatures generally accelerate chemical reactions. In the case of ascorbic acid, higher temperatures can increase the rate at which it reacts with oxygen from the air, resulting in oxidation. This oxidative reaction converts ascorbic acid into dehydroascorbic acid and other inactive compounds, further reducing its concentration in the solution.
3. pH dependence: Ascorbic acid is acidic, and its stability is pH-dependent. Higher temperatures can influence the pH of the solution and shift it towards more acidic conditions. Acidity can promote the degradation of ascorbic acid, leading to a decrease in its concentration.
Regarding the sudden drop in concentration at 30°C and subsequent decrease, followed by a concordant but lower concentration compared to 20°C, there could be a few reasons for this:
1. Temperature threshold: The sudden drop in concentration at 30°C may be due to a specific temperature threshold at which the degradation of ascorbic acid accelerates significantly. It is possible that other factors (such as pH, oxygen exposure, or impurities) contribute to this sudden drop.
2. Experimental conditions: Variations in experimental conditions, such as the presence of catalysts or impurities, inconsistent sample preparation, or differences in the duration of the reactions, can affect the observed concentrations. It is essential to ensure precise and consistent experimental procedures to reduce these discrepancies.
It is worth noting that further experimentation and analysis would be needed to pinpoint the exact cause for the observed results in your specific case. Proper control experiments and comprehensive data analysis can help identify potential factors influencing the concentration of ascorbic acid at different temperatures.
If you want to investigate this further, I would suggest ensuring accurate temperature control, carefully controlling other factors that may influence the reactions, and conducting additional experiments to gather more data points for a thorough analysis.