High school chemistry yes or no, ask for explanations.

Not necessarily, because it is possible that the pH of the original solution is exactly 7.

False, it should be NH3·HDO+D+.

False, AlCl3 becomes Al2O3, but Na2SO3 reacts with O2 in the air to become Na2So4.

Yes, C(Na+)+C(H+)==C(OH)- 2C(SO42-) while Na+ and SO42- are equal.

False, because acetic acid is not completely ionized, it will consume more NaOH error, the concentration is the same, all are monobasic acids, and the neutralization ability is the same.

I hope it can help you, if you don't understand, please ask

1. Not necessarily, but most of the time there will be errors, and there will be no errors if pH=7) 2. (NH4+ +D2O=NH3·HDO+D+, NH4+ combines OD- in D2O, this is the test point).

3. (No, only Na2SO4 can be obtained, because Na2SO3 is easily oxidized by air to Na2SO4.)

2Na2SO3+O2===2Na2SO4)5, (not the same, pH and volume are the same, indicating that N(H+) is equal.

But CH3COOH is a weak acid and is not completely ionized, so the concentration of acetic acid is greater than the concentration of hydrochloric acid, so the amount of substances that consume NaOH is acetic acid > hydrochloric acid. ）

6. (The ability of HCl in the same volume and concentration to neutralize alkali is as strong as that of CH3COOH).

A is an ionic crystal, the structure is similar to CSCL, that is, the ratio of the number of anions and cations is 1:1, the nitrogen content is up, and there is 1 nitrogen atom, then the amount of a formula = 14, guessed as NH4H

The chemical formula is: NH5, the cationic structure is a regular tetrahedron, and the hybrid form of its central atom is sp3.

Under certain conditions, a compound B can be synthesized with CUI, B is a reddish-brown and insoluble solid in water, X-ray diffraction confirms that B is a hexagonal crystal, the structure is similar to sphalerite, and the chemical formula of B is CUH to generate B is CUI+NH4H=NH4I+CUH. Throw B into hydrochloric acid solution, and the phenomenon seen is that white insoluble matter is generated, and gas is released; The equation for its chemical reaction is CuH+HCl=CuCl+H2

NH4H, regular tetrahedral, SP3 hybridization, CuH, NH4H+CUI= CUH HI NH3, colorless gas and white precipitation formation, 2CuH+2HCl=CuCl+2H2

The chemical formula of a is NH5, the cation is NH4+, the valence electron pair of N in the middle period is 4 pairs, the lone electron pair is 0, the structure is tetrahedral and sp3 hybridized.

Iron oxide and iron are relatively stable, but we can see that the above chemical reaction is actually mainly the gain and loss of electrons, the movement of electrons is very heavy, generally at high temperature or in Lachan solution, the free electrons are more active, for pure iron oxide and iron at high temperature should be able to reverse the wheel mold dust.

Iron oxide....Why do you react with iron....Burst.

The book talks about what happens when the dispersant is water or other liquids, but the dispersant for colloids is not necessarily water. There are also aerosols and solids present, depending on what the dispersant is.

Colloid, also known as colloidal dispersion, is a relatively homogeneous mixture, in which the colloid contains two different states of substance, one dispersed phase and the other continuous phase. A part of the disperse is composed of tiny particles or droplets, and the dispersion system of the disperse particles with a diameter of 1 100 nm is colloidal; Colloids are a kind of dispersion systems with a diameter of dispersed particles between the coarse dispersion system and the solution, which is a highly dispersed multiphase heterogeneous system.

I think it's because it's only a part of a liquid, as you said the dispersant is a liquid, but he has other things, and the colloids should be impure when they pass through. Purely personal understanding, liberal arts students should not spray.

Colloids are not necessarily liquids, for example, fog is a kind of colloid, and colloids are divided into solid sols, liquid sols, and aerosols. As the name suggests, a solid sol is a solid and an aerosol is a gas.

So there is, according to the conservation of r atoms, so there is hunger.

24, there are r atoms. The o atom of Mingkai, so it is N2O2 (there is no rotten locust pants)3), a-b = the mass of water, so it is (a-b) 18

Set coxmol, co2ymol

then 28x+44y=18

Conservation by carbon atom, x+y=

Solution x=y=

then the CO mass is 28*

CO2 volume is.

This topic should be a bit problematic, and it should be said that the corrosion rate of zinc goes from slow to fast.

D is the slowest, because the zinc is plated with copper, and the zinc is protected, followed by the type of Senyu B, the zinc is protected by the positive electrode of the battery, followed by A, the normal corrosion rate, and finally C, because the zinc is more active than iron, the negative electrode of the battery, which is faster than the case of A.