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There are several reasons why the boiling point changes when salt is added to water.

Firstly you have to understand the heat capacity (how much heat is needed to heat a substance) of water and salt. Water has a high heat capacity which means that it needs a lot of heat to warm the liquid up. However, when salt is added to water the heat capacity is lower, therefore less heat is needed to warm the liquid up.

Secondly, you have to observe the amount of salt added to water. So, if you compare 100ml of water to 100ml of salt water - what percentage of this solution is salt? (say 40% salt and 60% water). This is important because, the heat capacity of the 60% of the water in salt water, is 40% less than the 100% water, so it takes less energy to heat up the mixture.

Anyway, going back to the question, yes the boiling point does change slightly when salt is added. In fact the boiling point of water will increase with any impurity in the water. With Salty water the boiling point increases and freezing point decreases (but there is no definite boiling point for salt water because it depends on the ratio of salt to water).

Thirdly, when you add salt to water you change the molecular-level of water (also called colligative property). The concentration of water in salt water is less, so the vapour pressure of salt water is less and that's why the temperature must increase.

Lastly, when salt is added to H2O, the NaCl (salt- Sodium Chloride) interferes with the H and the O. This stops the liquid from behaving the way it usually does. Like when you freeze salt water...

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What are the independent and dependent variables of adding salt water to boiling water?

The quantity of salt added to water is under your control and it will change the boiling point of water,i,e. the temperature of water. So quantity of salt is an independent variable while the temperature of water is dependent variable, when other factors are kept constant.


What changes occur to water when salt is added, and which of the following does not happen to water as a result of the addition of salt?

When salt is added to water, it dissolves and forms a solution. This process is called dissolution. The addition of salt lowers the freezing point of water and raises its boiling point. However, the addition of salt does not change the density of water.


Does salt lower the boiling point?

Yes, Salt also lowers the freezing point of water, and lowers the boiling point of water. Add salt to a boiling pot of water and it immediately boils faster/harder at the location that the Salt hit the water.


Does salt make water hotter or colder?

No. Salt makes the freezing point of water lower and the boiling point higher. The particles of salt get in the way of crystal formation when freezing. They also get in the way of particles trying to escape when boiling.


Why does it take the water longer to boil when it has salt in it?

When salt is added to water, it increases the boiling point of the water, requiring it to reach a higher temperature to boil. This is because the salt disrupts the formation of water vapor molecules, which slows down the boiling process.

Related Questions

Why does the boiling point of water change when salt is added?

By adding salt it means that you are adding an impurity into the water. Impurities can lower the boiling point, while increasing its melting point.


What are the independent and dependent variables of adding salt water to boiling water?

The quantity of salt added to water is under your control and it will change the boiling point of water,i,e. the temperature of water. So quantity of salt is an independent variable while the temperature of water is dependent variable, when other factors are kept constant.


Why did the water stop boiling when the salt was added?

What did you observe! This is not a question we can answer as we were not present when the salt was added.


What changes occur to water when salt is added, and which of the following does not happen to water as a result of the addition of salt?

When salt is added to water, it dissolves and forms a solution. This process is called dissolution. The addition of salt lowers the freezing point of water and raises its boiling point. However, the addition of salt does not change the density of water.


Why salt is added in water for boiling an egg?

Adding salt to the water makes the egg easier to peel.


What happens when salt is added to water to change its color?

When salt is added to water to change its color, the salt dissolves in the water and does not directly affect the color of the water.


What chemicals change the boiling point of water?

Salt


What is the boiling point of pure water with salt?

When salt is added to water, the boiling point of the water increases. The exact boiling point depends on the concentration of salt in the water. As a general rule, for every 58.5 grams of salt dissolved in 1 liter of water, the boiling point will increase by 1 degree Celsius.


Does Epsom salt increase the temperature of boiling water?

No, Epsom salt does not increase the temperature of boiling water. However, it can help to increase buoyancy and reduce the cooking time of certain vegetables when added to boiling water.


Does salt lower the boiling point?

Yes, Salt also lowers the freezing point of water, and lowers the boiling point of water. Add salt to a boiling pot of water and it immediately boils faster/harder at the location that the Salt hit the water.


Does salt make water hotter or colder?

No. Salt makes the freezing point of water lower and the boiling point higher. The particles of salt get in the way of crystal formation when freezing. They also get in the way of particles trying to escape when boiling.


What is the independent variable in this experiment what effect does table salt have on the temperature of boiling water?

The independent variable in this experiment is the amount of table salt added to the boiling water. The effect of adding salt to the water is to raise the boiling point of the water, therefore increasing the temperature at which the water boils.