How would you react? How do these react?

Oh, I'll ask her what's going on, if there's something else. Of course, I wouldn't be angry in the first place.

mgcl2+co2

al(no3)3+co2

cacl2+co2

These three cannot react because "strong acid makes weak acid".

hcl+fe=fecl2+h2

NaCO3+Cl2 does not react, and no weak electrolyte is generated.

SiO2 + concentrated HNo3 reaction hall orange accompaniment, to generate silicic acid, is to precipitate H2SiO3Li+ HCl to react, to generate chlorine dumb lithium and hydrogen.

BaSO3 is a precipitate.

Mno2+FeCl3 does not react, and FeCl3 is not strongly oxidized.

Judge whether something reacts with a substance that does not contain s or n.

It depends on the valency, the valency of N or S, and the strength of the oxidation or reduction of the reactants. The reverse is the same.

The reaction of the sharitex reagent oxidizing the primary alcohol to -unsaturated aldehydes.

This reaction is the Diels-Alder reaction.

That is, the synergistic addition of diene and diene reagent. See Fig

This is a diene synthesis reaction, also known as the Dils-Alder reaction, which is a synergistic reaction completed in one step, that is, the breaking of the old bond and the formation of the new bond occur by colleagues, and the reaction produces two isomers - enantiomers. Among them, 2,4-hexadiene is called dienyl, and methyl propynate is called pro-diene. When there is an electron-pushing group on the dienomer and an electron-withdrawing group on the diene-philophile, the reaction takes place very solution-oriented.

Therefore, the above reaction tends to generate two isomers.

In general, there is a change in some condition that drives this reaction to occur. For example, acid-base neutralization produces water, which is a weak electrolyte, so that the hydrogen ions and hydroxide ions in the solution tend to decrease, so as to promote the reaction.

The formation of precipitation also makes the concentration of ions in the solution tend to decrease, which promotes the reaction. Generally speaking, there are several principles to grasp: there are weak electrolyte generation, strong acid to weak acid, soluble matter to insoluble matter, difficult volatile matter to volatile substance, etc., all of which can make the chemical reaction established.

The tension of the quaternary ring is large, and the specific step of the inclined ring expansion is that the hydroxyl group is protonated to become -H2O+, and then the water is removed to become a carbocation, and then a pair of electrons on a C-C bond on the quaternary ring attack this carbocation, forming a carbocation of the five-membered ring, and then Cl- attacks to obtain the product.