With regard to the first page of the salt hydrolysis application, a total of 20 pages of slides reflect on the principles of foam fire extinguishers, the solution of aluminium sulphate in the plastic drums of the foam fire extinguisher, the solution of sodium sodium carbonate in the iron drums, the principle of reaction, and why is aluminium sulphate in the plastic drums and sodium carbonate in the drums? Page 2, 20 pages of slide (1) formulation and preservation of hydrolysed salt solution: why is the cucl2 solution made of hot water, and the solution becomes fuzzy? How do you make the solution clear? Cucl2+2h2ocu(oh)2+2hcl(heat) or cu2+2h2ocu(oh)2+2h+(heat) formulation of cucl2 solution to prevent confusion, a small quantity of should be added
The same can be said of the 20-page slide question of rare hydrochloric acid block i, salt hydrolysis in chemical experiments: when an iron sulphate solution is made with hot water? How can a clear iron sulphate solution be formulated with hot water? : a metallic salt solution ready for hydrolysis shall be made with a small quantity of and a small quantity of the fe2(so4)3 solution. Page 4 of the acid corresponding to the anion, 20 pages of slide (2) laboratory storage of certain reagent bottles: question 3, why can't the reagent bottle containing na2s, na2co3 be plugged in glass? Can the nf solution use a glass bottle? Note on page 5, 20 pages of slides: all reagent bottles for laboratory alkaline solvents use rubber plugs like na2co3 solution storage using rubber plugs co32-+h2o
Hco3-+oh-sio2+2oh-=sio32-
+h2o, page 6, 20 pages of slide (3) evaporating hydrolysable salt solution question 4: demolition of fecl3 solution, what was the last solid product obtained, and why? 2fe(oh)3 = fe2o3+3h2ocl3+3h2ofe3(oh)3+3hcl(1) heated for hydrolysis (2) hcl volatilization on page 7 (2) hcl with a total of 20 pages of slides, although al3+hydrolysis resulted in al(oh)3 and h2so4, because h2so4 is highly boiling point acid, is not volatile and the heating is ultimately only the evaporation of water, so al2(so4) 3 solids remain. 3h2so4+2al(eth)3 = al2(so4) 3+6h2o q5: what is the solid after thermal evaporation of al2(so4)3 solution
Al2(so4) 3+6h2o2al (oh) 3+3h2so4 page 8, 20-page slide exercise: analyse what solids have been obtained from the evaporation of the following salt solutions, write the chemical formula and outline the reasons. (1) the solids from the aqueous evaporation of potassium carbonate are
Reason
I don't know. (2) the solids from the sodium sulphate solution evaporation are
Reason
I don't know. K2co3 although heating facilitates the hydrolysis of potassium carbonate, the product reflects the determination of 20 pages of slide saline solution evaporation and burning products resulting from the production of potassium carbonate na2so42na2so3+o2 = 2 na2so4 page 9
First to determine whether the salt is hydrolytic: 1 if the hydrolytic product is volatile (alcl3 hydrolysed to produce al(oh)3 and hcl)
) promotes hydrolysis and determines the final product depending on whether another hydrolysis product is dissolved;2 if the hydrolysis product is volatile (al2(so4)3
Hydrolysis produces al (oh) 3 and h2so4, while water evaporates during heating, inhibiting hydrolysis, while the remaining solids remain the original salt when the solution is evaporated;3 if the reduced salt (na2so3) solution takes into account oxidation on page 10, 20 pages of slide block ii. Salt hydrolysis in agricultural production: fertilizer use - - why not? Agricultural proverb: “ash, ash, ash, ash, ash.” thinking: why do you lose weight? On page 11, 20 pages of slide ash is not suitable for mixing with ammonium nitrogen fertilizer: ash composition: k2co3, hydrolysis alkaline co32-+h2ohco3-+oh, hco3-+h2oh2co3+oh-, ammonium nitrogen fertilizer - ammonium salt, hydrolysis acidic. The combination of nh4+h2onh3 h2o+h+, after which oh-and h+ medium-sum water moved the hydrolysis balance of the two salts strongly to the right, leading to the generation of large quantities of nh3 h2o, further decomposing into nh3 and thus reducing fertility. Page 12, 20-page slide block iii. The problem of salt hydrolysis in everyday life: kal (so4) 2 12h2o can be used as a water purification principle. Al3++3h2o
Al(oh)3 (gel)+3h+
Al(oh) 3-gel surfaces are large and adsorptive, capable of adsorbing suspended impurities in water to produce sedimentation for water purification. Page 13, 20-page slides with high co32-+h2ohco3-+oh-
Hco3-+h2o2co3+oh-(thermal) question 8: why is it good to wash oil with thermal pure alkali solutions
Page 14, 20 pages of slides
Common sense of life
Why do you wash your clothes with soap and warm water better than cold water? Major components of soap: sodium hard-fatate (c17h35coona) hard-fat acid (c17h35cooh) is a one-dollar weak acid c17h35coo-+h2oc17h35cooh+oh-
Page 15, 20 pages of slide question 9: magnesium metal is difficult to react with water, and if some nh4cl immediately produces large amounts of gas, why? Total equation: mg+2nh4cl=mgcl2+2nh3↑
+h2 ↑ block 4. Nh4++h2onh3 h2o+h+nh3 in industrial production h2o
= nh3↑
+h2omg+2h+=mg2+h2↑ page 16, 20 pages of slide question 10: if al2s3 is prepared, because it is not available in the solution, it is fully hydrolytic and can only be derived from a direct dry reaction. Question 11: how do you get a water-free fecl3 from the evaporating fecl3 solution? When solution solutions such as alcl3, mgcl2 and fecl3 are not available for heating drying, the crystals alcl3, mgcl2 and fecl3 must be evaporated into the hcl gas in order to inhibit fecl3 hydrolysis in order to obtain their solids. Page 17, summary of 20 pages of slide knowledge: application of saline hydrolysis using hydrolysis: foam fire extinguisher principles; saturated fecl3 solution glues; cyanide clean water; pure alkali solutions capable of decontamination, etc. Curb hydrolysis: consider hydrolysis:
Fecl3, sncl2, feso4 etc. Are made with acid or solution in acid. Analysis of salt solution ion concentrations, acid alkalisity; fertilizer mixing; salt solution concentrate evaporation, etc. On page 18, a total of 20 slides, when cyanide and pure alkalis are in the water, are chemically altered and produce large quantities of co2 and cylindrical. In combination with the face, the stylist al (oh)3 and the face produce membranes that wrap co2 gas. Oil bars are placed in hot oil pans, and co2 is swelled by heat, causing them to swell. That's why the fryers are gill and base. However, the ratio between them must be well managed, with more amphibians and more al (oh) 3 produced by hydrolysis, resulting in hard, corrosive, bubble-intensive and high consumption of oil bars. If more alkaline is placed, it can turn the oil bar colour yellow and add to its bitterness. The ratio of neptunium to alkalis is 2. 5:3. 5. You'll have to show the 19 pages of radon and pure alkaline when you're frying. Snippets
