【高中综合】高中化学(国外英语资料).docVIP

【高中综合】高中化学(国外英语资料) [high school comprehensive] high school chemistry,.Txt today in a bad mood. I have only four words to say. Include this sentence and the preceding two sentences. My word is finished, to deal with evil people, will be more vicious than him; to deal with despicable people, it is more despicable than he, no Valentines taste, where the human touch, what the whole death of you, my love. No change, said the cashier. Two plastic bags for you.! 1, valence (common element valence): Alkali metals, Ag, H:+1, F: - 1 Ca, Mg, Ba, Zn:+2, Cl: - 1, +1, +5, +7 Cu:+1, +2, O: - 2 Fe:+2, +3, S: - 2, +4, +6 Al:+3 P: - 3, +3, +5 Mn:+2, +4, +6, +7, N: - 3, +2, +4, +5 2. Redox reaction Definition: the electron transfer (or valence) reaction Electron transfer (including the gain and loss of electrons) Feature: valence lifting The oxidizing agent (oxidising) - electron - valence is reduced, the reduction product decline The reducing agent (reducibility) - Electronic - rise - oxidation - valence oxidation products Formula: -- drop - (was) - oxidant reduction Loss ascension -- (by) oxidation - reducing agent 3, metal activity order table K, Ca, Na, Mg, Al, Zn, Sn, Fe, Pb (H), Cu, Hg, Ag,, Pt, Au Gradually diminished 4, ion reaction Definition: reactions involving ions Electrolyte: a compound that conducts electricity in an aqueous solution or in a molten state Non electrolyte: a compound that cannot conduct electricity in an aqueous solution or in a molten state The writing of ionic equations: Step 1: write. Write out the chemical equation The second step: demolition. Soluble in water, easily ionized substances split into ions form; insoluble (such as CaCO3, BaCO3, BaSO4, AgCl, AgBr, AgI, Mg (OH) 2, Al (OH) 3, Fe (OH) 2, Fe (OH) 3, Cu (OH) 2), hard ionization (H2CO3, H2S, CH3COOH, HClO, H2SO3, NH3? H2O and H2O), gas (CO2, SO2, NH3, Cl2, O2, H2), (Na2O, MgO, Al2O3 oxide, etc.) is not removed The third step: delete. Delete the ions before and after The fourth step: check. Check