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What is the gas liberated from the heated substance in the test tube?
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Why was the test tube held in the flame at 45 degrees angle?
To make sure any substance or gas released does not travel to someone's face directly. (safety) tilting the tube increases surface area of the solution inside, gas reaches the surface easier and at a shorter distance. the solution is exposed to more air. if adding anything, more of the substance reacts at once with higher surface area and less depth.
Which is the correct way to hold a test tube whike heating its unknown chemical?
When heating a test tube with any substance in it, you hold it with a test tube holder, pointed away from you and other people.
What happen when a test tube of liquid is heated improperly?
- the test tube may break- the liquid can be spread outside
When bright red mercury (II) oxide is heated in a test tube oxygen gas is evolved and droplets of liquid mercury condense at the cooler top of the test tube.?
Yes, it is correct.
Is the compound iron sulfide formed by mixing iron and sulfertogether?
It can't be mixed it has to be heated togther in a test tube
What two things are important to remember when heating a test tube?
never hold the heated test tube with your hands or you will get burnt.if you want to hold a heated test tube hold it with tongs or a test tube holder. also have a teacher help you.
Why substance stick to the test tube?
The ability of a substance to stick on inside part of a test tube depends on its surface tension, that's why substances such as water can stick to a window. And the other reason for sticking of a substance to the test tube could be that the test tube itself is dirty, thus the dirt particles hold the substance in place.
Why does the substance in the column of the thermometer go up when it is heated?
The substance expands - and the tube (column) constrains it to go upwards.
Heated test tube using burner with closed air holes?
Heated test tube with a bunsen burner with closed air holes would result to the test tube having some kind of black material at the bottom, it looks like a burnt coal that stick to the bottom of the test tube. This happens because the flame is not a good flame.
What do you call the purple gas that fills the test tube when a few crystals of iodine is being heated inside a test tube?
This is also iodine, as a gas.
What do you call the purple gas that fills the test tube when a few crystal of iodine is being heated inside a test tube?
This is also iodine, as a gas.
What instruments hold test tube being heated?
A retort and clamp or tongs.
What happens if the mixture of iron and sulfur is heated in a test tube?
it makes it biger
Function of the test tube?
use to hold liqud or substance
Why was the test tube held in the flame at 45 degrees angle?
To make sure any substance or gas released does not travel to someone's face directly. (safety) tilting the tube increases surface area of the solution inside, gas reaches the surface easier and at a shorter distance. the solution is exposed to more air. if adding anything, more of the substance reacts at once with higher surface area and less depth.
Which is the correct way to hold a test tube whike heating its unknown chemical?
When heating a test tube with any substance in it, you hold it with a test tube holder, pointed away from you and other people.
Should you hold a test tube while being heated?
no, you'll burn yourself
