Q:Distinguish iron powder and graphite powder by chemical method

This problem is very simple, the use of chemical methods to distinguish: there are many ways to give me introduce you to some here, one plus HCl for Fe+HCl=FeCl2+H2, C and HCl reaction, 2: they were put into CuSO4 solution, can replace the red metal iron, whereas C

Q:Graphite powder what is the difference?

Lead chemical symbol Pb, belonging to heavy metals, toxic to the human body, excessive intake of lead will accumulate in the body, the body can not take the initiative to discharge, a great harm.

Q:What if the key is inserted in the hole and can not be drawn out?

The end of the pencil is made of graphite, and the graphite powder can be used as lubricant for the machine running under high temperature, and the pencil core can be made. Add some pencil powder to the keyhole. Try to lubricate the inside of the keyhole. Try it!

Q:Is the graphite powder poisonous?

There are three kinds of substances that fly out of the black spot from the carbon factory:1. Bituminous dust.2. A relatively fine particle of calcined coke (petroleum coke after calcination).3. A fine particle of calcined and graphitized Shi Mofen (calcined coke and bituminous mixture).Both poisonous.

Q:Refractive index and absorbance of graphite powder

When the matter to be measured is different, or the wavelength chosen is different, the molar absorption coefficient will be different, so that it can not meet the quantitative relationship of Bill's law.

Q:Phosphoric acid, two aluminium hydride, with graphite powder and mud

Some of the key wavelengths off the chemical bond are shown below. The C-N bond is easiest to break, and the C-H bond is the hardest. You can also see that ultraviolet radiation can cause many chemical bonds to break. The activation wave length of some polymers is listed below. The data in the following table show that different polymers have different maximum damage wavelengths, and often the maximum damage wavelength is called the maximum activation wavelength. At this particular wavelength of light, the polymer can crack at the fastest rate.

Q:How many kinds of lubricating graphite powder can be added to the car engine?

The scale and rust in the water tank are not very strong. It is a little growth. Graphite powder added, good dispersion, destroy the growth condition of scale and rust, no longer changxin. Then, have grown in water flow, under agitation, a little bit is washed down, and can no longer stick back, then, are in the water.

Q:It's hard to remove a lot of graphite powder on the glass cake. Who has a good way to remove the graphite powder above?

Suggestion: use a certain amount of concentrated nitric acid infiltrated graphite part, nitrate solution the best there is a certain amount of 1-2 weeks (timing can also be placed with a glass rod, pour stirred) acid, diluted with water to acid and then scrub brush. Because the temperature nitric acid reaction is very slow, but the long-term infiltration, the graphite surface. Especially with the glass contact surfaces may be immersed in a small amount of acid, oxidation, then scrub may have the effect.

Q:How much is the price of graphite powder for a ton?

Qingdao Chenyang graphite is China's Graphite brand-name products, strong technical force, perfect measuring and testing, quality assurance system.

Q:Thermal conductivity and density of graphite powder

In the formula, P is porosity, and lambda 0 is the thermal conductivity without hole (P=0). This formula is of historic significance. For graphite, the pores are not spherical or more unequal, but of course they do not apply. But it shows that the larger the porosity (the smaller the density), the smaller the thermal conductivity. This qualitative conclusion is correct. An extruded graphite core with different impregnation treatments