Essay On Effect Of Temperature On Food And Liquids

1457 Words 6 Pages
Hauppauge High School
February, 1

The effect of temperature on pH in food and liquids.

Seferian , Celina

I. INTRODUCTION
By putting the food or liquids into a pan and raising the temperature of it then we may possibly see a change in pH. Temperature may have an affect on the pH of solids and liquids. All solutions will change their pH value with temperature. Temperature affecting pH is a result of the shifting of the chemical equilibrium of the components, mainly of dissociation. Dissociation is the splitting of a molecule into smaller molecules, atoms, or ions, especially by a reversible process. Before any experiment was performed, research was done and it is said that temperature does affect the pH of food and liquids. Temperature effects
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Temperature was the key factor to this experiment.

The role of the food is what was being tested and it would need to show a change in the pH to prove the hypothesis correct.

The role of the liquids being used is to raise or decrease pH just as the food would.

Le Châtelier 's Principle states if you make a change to the conditions of a reaction in dynamic equilibrium, the position of equilibrium moves to counter the change you have made. Hence, if you increase the temperature of the water, the equilibrium will move to lower the temperature again. It will do that by absorbing the extra heat. That means that the forward reaction will be favored, and more hydrogen ions and hydroxide ions will be formed.

The table below shows the effect of temperature on Kw. For each value of Kw, a new pH has been calculated.

T (°C)
Kw (mol2 dm-6)
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The more equal amount you use the more equal data will be received.
Amount of liquid- 1 cup of the liquid for the most accurate results. If the measurements are not the same for each trial, the results may not be as accurate as they should be.

Independent Variable:
Temperature- Temperature is being controlled at a certain degree so that the results are as accurate as possible. There was a 3 degree (plus/minus) leeway for uncertainty. Temperature is remaining constant for the most accurate results.

Dependent Variable: pH- As stated in my hypothesis, it is expected that pH change as the temperature increases. Throughout research before any experiment was performed, it is clear to see there is some type of correlation between temperature and pH.

Safety and Ethical Considerations:

There is nothing too dangerous about this. The hot plate is the only concern and hot hands will be used at all times throughout the experiment.

No chemicals are being used throughout the experiment.

The environment will not be harmed throughout the process of this experiment.

No animal or humans will be

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