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Aim:
To investigate the boiling point of water by the addition of salt.

Plan:
First I will boil 100ml of water and record the temperature at which it boils. I will then add 5g of salt at repeat the experiment noting any change in the boiling point. I will then repeat the experiment several times increasing the amount of salt by 5g each time, recording my results on a table.

Prediction:
I predict that by adding salt to water it will affect the point at which it boils. I predict that the boiling point will be raised because salt is used to melt ice on roads so I believe that it will have the same effect on water.

Method:
100ml of water was placed in a beaker and brought to boiling point. Next we added 5ml of salt and brought it back to the boil. The experiment was repeated adding 5g of salt each time until the solution became saturated. Salt solution - NaCl (sodium chloride)

Results:
http://www.gourmetsleuth.com/gram_calc.htm As the salt was added to the water the boiling point rose. The temperature at 15g and 20g appeared to remain constant but I feel this was due to the inaccuracy of my experiment rather than any scientific reason. When the solution became saturated the boiling point remained constant as can be seen from my graph and table of results.
 * **Solution** || **Temperature** ||
 * water || 100°C ||
 * water + 5g salt || 100°C ||
 * water + 10g salt || 102 °C ||
 * water + 15g salt || 104°C ||
 * water + 20g salt || 104°C ||
 * water + 25g salt || 106°C ||
 * *water + 30g salt* || 107°C ||
 * water + 35g salt || 109°C ||
 * The solution became partly saturated, but as the boiling point continued to rise it could not have been fully saturated.

Conclusions:
Salt can be used to retard the effect of evaporation when water is boiled by raising the boiling point. This is most effective in cooking. The salt is absorbed by the water forming a solution the salt is soluble. When the water reaches saturation boiling point remains constant.

How does table salt affect the boiling temperature of water? || Many cooking recipes give you the instruction of adding salt to the water when boiling something. This can do many things to the water and there must be a special reason why they tell you to add salt to the water. This experiment will show us how salt affects the temperature of boiling water. || Adding table salt to boiling water will cause the water to boil at a higher temperature. || · Table Salt · Distilled Water · 2 Quart Cooking Pot · Pint measuring cup · Teaspoon and tablespoon measuring spoons · Thermometer · Stirring spoon || 1. Boil one quart of distilled water on a stove. 2. Measure the temperature of the boiling water. Record the highest temperature reading. 3. Measure out table salt using a kitchen measuring spoon. Level the spoonful. 4. Add the measured salt to the boiling water and stir. 5. Measure the temperature of the boiling water with the salt in it. Record the highest temperature reading. 6. Repeat it now with two spoons of salt. ||
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 * Research:
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 * Record And Analyze Data: || Temperature of Boiling Water || 212.9° F ||
 * Amount of salt added the first time || 1 spoon full ||
 * Temperature of boiling water after salt was added || 215.6°F ||
 * Amount of salt added the second time || 2 spoon fulls ||
 * Temperature of boiling water after salt was added the second time || 218.3° F ||  ||