My uncle is deficient in potassium, netizens help!!!!!!!!!!!!!!

Chemical equation: HGS+O2=HG+SO2 HG+S=HGS

How do you turn red? It is said on the Internet that when the air is isolated, at 600 650, the black mercury sulfide can be sublimated into red mercury sulfide. But I simply tried it, and it didn't seem to happen, it was still dark, and it didn't work...... way

Then continue to search and find the wet conversion.

After the long-term reaction of mercury with Na2SX at 45 60 to form black mercury sulfide, it is dissolved in Na2S (X-1) at the same time to form Na2[Hgs2]·5H2O. When the dissolution reaches saturation, Na2[Hgs2]·5H2O rearranges the lattice and transforms into red mercury sulfide under the influence of S2-.

Reaction Equation:

HG+NA2SX NA2SX-1 +HGS Black X>3

HGS black [NA2S(X-1)] HGS red.

It seems to be reliable, but when I think of it, there is a bottle of sodium sulfide from someone else, which can be used, turned it out, and found that there is deliquescent, and then I accidentally spilled the liquid, and then the room was full of stinky tofu ...... smellAfter a simple clean-up, when the solution was saturated, black sodium sulfide was thrown into it, and it was surprisingly found that it turned red in a few seconds, and a minute later it turned bright red, and the experiment was successful

This means that black HGS is just a complex structure of red HGS, which is equivalent to the concept of polymers.

HG (liquid state at room temperature) and S are in full contact at the time of grinding, and a reducing monoxide is a firewood and reacts

Black mercury sulfide is heated into red mercury sulfide crystals isolated from air, and the process of sublimation and condensation will occur, and the color is different because of the different arrangement of particles in the crystal. Not a new substance. The combination of mercury and sulfur is unusually easy and can be reacted by grinding.

(1)hgs+o2=△=hg+so2

hg+s==hgs

2) Physics. The substance has not changed.

Physical change is necessary, black and red only refer to the different arrangement of mercury sulfide ions, but after all, it is still mercury sulfide.

The different arrangement of different colors of light absorption and reflection is different, resulting in different colors, grinding is a reaction condition, the grinding process increases the contact area between objects, and heats.

(1) HGS+O2 heats HG+SO2

2) Because there is no chemical change, only the crystal structure of mercury sulfide has changed, see.

The equation for the formation of mercury sulfide is hg+s hgs

With XGCO, then CO2 is (10-x)G:

12x/28+12x/48)/10=

If x=co, it is converted into co2 and the original co2:

There is a total of CO2 = to generate CaCO3 precipitates.

There are 10% = carbon in the C36g mixture.

Therefore, after reacting with cuo, it will be generated, and it will also be obtained, which is 30g

It is a physical change, and no new matter is generated.

1.(1) y=9 5x(0 cong ming x 15)y=12 5x-9(x 15).

2）5=（60-t）x①

10=（90-t）x②

Get (60-t) (90-t) = and get t = 30, that is, you can carry 30kg for free

Take the old. 16=3x+t②

2x=1, x=, substituting or t=, then y=3⑴200m

y=200x-1000

600m

The square of 44a minus the square of 15a is equal to the square of 29a.