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高中化学基础概念理论总结（ Theoretical summary of basic concepts in senior high school chemistry ）
Theoretical summares and ions; 〔6〕 anions and cations; 〔7〕 cations and cations
, salt and alkali react to produce new salts and bases; acids and bases react only to produce salts and water
Wrong, such as 10HNO3+3Fe 〔OH〕 2=3Fe 〔NO3〕 3+NO = +8H2O
The two acids of =2 and pH=4 are mixed, and the pH value of the mixture must be between 2 and 4
Wrong, such as 2H2S+H2SO3=3S: +3H2O
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10. strong electrolytes are ionic in the ionic equation
The strong electrolyte and H2SO4 that are insoluble in water should be written as molecules
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The 11. ionization compounds only H+ cation can make purple litmus red
Wrong, like water
formic acid ionization equation is: HCOOH===H+ + COOH-
Error first, ionization is reversible, followed by formate ion should be HCOO-
ionic crystals are ionic compounds, and molecular crystals are covalent compounds
Many molecules are elementary substances
generally, metal oxides, colloidal particles of metal hydroxides, are positively charged
Correct
In the 15. element periodic table, the number of elements in each cycle satisfies 2n^2 〔n is the natural number〕
Yes, note that n is not a perio