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# How can boiling point be used to find out if a substance is pure?

Updated: 9/24/2023

Wiki User

9y ago

At Boiling Point all the material evaporates leaving no residue which means it is pure.

But if it leaves some residue after evaporating at boiling point then it is not pure.

For example : If you take an example of pure water & Saline Water then pure water will evaporate at its boiling point leaving nothing after it.

But Saline water evaporates leaves salt behind it.

Wiki User

9y ago

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Q: How can boiling point be used to find out if a substance is pure?
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Related questions

### For any pure substance the boiling point and melting point will always remain?

The melting point and the boiling point of a substance are physical characteristics for each substance and are unchanged at the same pressure.

### How can the melting and boiling point help you identify it?

Each pure substance has its own unique melting and boiling point.

boiling point.

### On the basis of its boiling point identify the pure liquid as either ethyl acetate or butyl acetate?

To identify a substance, you must find more than its boiling point. Also look for its freezing point and density.

### How do the boiling point ranges show that each fraction is a mixture of different compounds instead of a pure substance in fractional distillation?

Any pure substance has only a single boiling point. If you are getting a range of boiling points, then you are heating a mixture of substances, necessarily.

### A pure substance boils only at a certain temperature?

Each liquid boils at a different temperature, but the temperature it boils at is called the Boiling Point. For example, the boiling point of water is 212 Fahrenheit.This specific temprature is dependant on the pressureon the liquid at that time, as an example at ahigher temperatures the boiling point is higher.

### What is pure is substance?

Chicken multiplied by the numerator of 64= Peanut Butter

### What is Liquid point?

Boiling point is the temperature in which a substance in a liquid state turns to a gas state. In a pure substance (an element or 1 compound) that temperature is a unique property. For example, pure water boils at 100 degrees Celsius. Methanol has a boiling point of 64.7 degrees Celsius. In pure substances the temperature time graph makes a plateau. The boiling point is the same as the condensation point (where a gas turns into a liquid) for that substance.

### What is the boiling point of jelly?

Because jelly is not a pure substance and its composition can change it has no fixed boiling point. It would depend on each particular jelly.

### What is liquid's boiling point?

Boiling point is the temperature in which a substance in a liquid state turns to a gas state. In a pure substance (an element or 1 compound) that temperature is a unique property. For example, pure water boils at 100 degrees Celsius. Methanol has a boiling point of 64.7 degrees Celsius. In pure substances the temperature time graph makes a plateau. The boiling point is the same as the condensation point (where a gas turns into a liquid) for that substance.

### How do you determine that the distillate collected is a pure substance?

You can check certain properties, such as density and boiling point.

### How could you use the physical properties of melting and boiling point to identify a substance?

If you know the melting point and boiling point of a substance, you could look them up in a table to see what substances have those melting and boiling points. In practice, there are lots of other tests you'd probably want to do in addition, because in general there's no guarantee that an unknown substance is a single pure compound.