What conditions can two substances meet to react?

Answer 1

Different types of reactions required different conditions:
1. ** Metathesis reaction **:
- In the reaction between acid and base, at least one of the reagents must be dissolved in water; when acid and salt react, acid must be dissolved in water; when salt and base react, salt and salt react, both reagents must be dissolved in water.
- For the product, there was either water formation, or settling formation, or gas formation. However, the two types of salt in the middle and junior stage of the reaction were both dissolved, and at least one of the two types of salt obtained from the reaction was difficult to dissolve.(The metathesis reaction of salt and salt); the reagents must be generally dissolved, and at least one of the products must be a gas or a precipice (only the reaction of an amine with an alkalium can produce a gas, and the metathesis reaction of salt and alkalium); when acid + salt → new acid + new salt, the acid in the reagent must be dissolved, and at least one of the products must be a gas or a precipice or water; when acid + base → salt + water, at least one of the reagents must be dissolved.
2. ** organic reaction **:
- ** Reaction **: After the addition reaction, the heavy bond will be opened, and the atoms at both ends of the original heavy bond will be connected to a new group.
- ** Elimination reaction **: Under appropriate conditions, an organic compound will remove a small molecular (such as water, hydrogen Halide, etc.) from a single molecular to form an saturated (double bond or triple bond) compound.
- ** Substitution reaction **: A reaction in which an organic compound is attacked by a certain reagent, causing a radical (or atom) in the molecules to be replaced by this reagent.
- ** Polyaddition reaction **: The reaction between the molecules produces a high molecular compound.
- Condensation reaction: A reaction in which two or more organic molecules interact to form a large molecular chain by a single bond, while losing water or other relatively simple organic or organic molecules.
3. ** Inorganic reaction **:
- ** decomposition reaction **: A reaction in which a compound is decomposed into two or more simple substances or compounds under specific conditions.
- ** Combination reaction **: A reaction in which two or more substances form a new substance.
- ** Substitution reaction **: A reaction between a simple substance and a compound to form another simple substance and another compound.
4. ** Oxidation-reduction reaction **: A chemical reaction in which the valency of an element changes before and after the reaction.
5. ** Ion reaction **: A chemical reaction involving ions.
6. ** Other reaction types **:
- For some special organic reactions, for example, the conditions for the chloridizing reaction of alkyls were Cl2/light or vl h; the reaction conditions for the replacement of hydrogen atoms on the aromatic ring of aromatic and its homolog were X2/FeX3; the nitration reaction conditions on the aromatic ring were concentrated HNO3/concentrated H2SO4; the addition reaction conditions for carbon-carbon double bond, carbon-carbon triple bond, aromatic ring, aldo group, and carbonyls were H2/catalyst, A; the addition reaction conditions for alkene were H2O/catalyst; Complete C-C double bond cleavage reaction of alkene and cycloalkene (forming a carbolic acid or a keto, with no hydrogen atom on the double-bond carbon atom), a homolog of the aromatic the side chain is oxided The reaction conditions for the side chain alkyls to be oxided to-COOx, the primary alcohol to be oxided to be oxided to The conditions for the reaction of the acidic decomposition of oil and starch (sugar) were H2O/H+, and the conditions for the reaction of the acidic decomposition of oil and starch (sugar) were H2O/H+, and the conditions for the reaction of the acidic decomposition of oil and starch (sugar) were H2O/H +, and the conditions for the reaction of the acidic decomposition of oil and starch (sugar) were H2O/H +, and the conditions for the reaction of the reaction of the acidic decomposition of oil and starch (sugar) were H2O/H +, and the conditions for the reaction of the reaction of the acidic decomposition of alcohol and ester were H2O solution, and the conditions for the reaction of the acidic decomposition of alcohol and ester were H2O solution, and the conditions for the reaction of the acidic decomposition of alcohol and ester were H2O solution, and the conditions for the reaction of the acidic decomposition of alcohol and ester were H2O solution, and the conditions for the reaction of the acidic decomposition of alcohol and ester were O2/Cuor O2/Ag.
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