高二学生下学期化学学习计划模板范文Sophomore students chemistry study plan next term model.docx

1、高二学生下学期化学学习计划模板范文Sophomore students chemistry study plan next term model高二学生下学期化学学习计划模板范文05月12日（Sophomore students chemistry study plan next term, model 05, 12）The Zhang Bei study program is shared every day_.(3) there are indigenous people with excess stomach acid treatment, the method is: wash the

2、 egg shell, burning, grinding taking. The treatment is said to work well. Please use the knowledge you have learned to analyze the truth. _.(4) sodium hydroxide can neutralize gastric acid. Why not use sodium hydroxide to treat gastric acid excess? _.The main component analysis of acid is hydrochlor

3、ic acid, NaHCO3, Al (OH) 3, egg shell (mostly CaCO3) can react with HCl to reduce the effect of gastric acid, while NaOH can neutralize stomach acid, but because it has a strong corrosive, will damage the digestive tract, so it can not be used to NaOH treatment of hyperhydrochloria.Answer (1) HCOH=C

4、O2 have H2O(2) Al (OH) 33H=Al33H2O(3) CaCO3 containing egg shell, wash to removing debris, burning is mainly sterilization, disinfection, after taking the CaCO3 reaction with acid to reduce gastric acid concentration, CaCO32H=Ca2CO2 = H2O(4) NaOH is very corrosive and can seriously damage the digest

5、ive tract10. there is a bottle of clear solution, which may contain NH, K +, Mg2 +, Al3 +, and Ba2, SO, CO, NO, Cl -, I, the solution for the following experiments:The acidity of the solution was measured by pH test paper;Take the part of the solution, add a few drops of water and a small amount of

6、new CCl4, the oscillation, static, CCl4 layer is purple red;Thirdly, some solutions were added into the dilute NaOH solution, and the solution gradually changed from acidic to alkaline, and no precipitation occurred during the whole process;Take some of the above alkaline solution, adding Na2CO3 sol

7、ution, white precipitate is generated;The alkaline solution by the heating, gas release, red litmus paper can make the gas wet blue.Answer the questions according to the above experimental facts:(1) write the ion reaction equation _.(2) ions present in the solution is certainly _.(3) the solution mu

8、st not exist is _ ion.(4) the solution can not determine whether there is _ ion.The analysis first considers the coexistence of ions given in the subject. Ba2 and SO, and I, CO and Fe3 +, Mg2 +, Al3 +, H + Ba2, not a lot of coexist in solution. By step I know that there is a large amount of H + in t

9、he solution, so that the presence of CO can be excluded. By the steps of knowledge, CCl4 layer with iodine, the solution containing I. According to the idea of ion coexistenceWant to judge no Fe3 + in solution under the acidic conditions without NO. By the step out the presence of Mg2 +, al3. By the

10、 steps of knowledge, the precipitation is BaCO3, in a solution containing Ba2 which can exclude the presence of SO. The gas produced by the process is ammonia, so the solution contains NH.Answer (1) Cl22I=I22Cl(2) NH, Ba2, I(3), SO, Mg2 +, Al3 +, CO, NO(4) K + and Cl11. a compound consisting of shor

11、t cycle elements, X, is an effective component of an antacid, and a classmate would like to explore the composition of X and refer to the data:The effective ingredients of the antacid consisting of short cycle elements may be sodium bicarbonate, magnesium carbonate, aluminium hydroxide, magnesium al

12、uminum silicate, aluminium phosphate, magnesium carbonate and magnesium carbonate.The Al3 in pH = 5 complete precipitation;Mg2 + begins precipitation at pH = 8.8 and precipitates completely at pH = 11.4.Experiment process:I add excess hydrochloric acid into the powder of the compound X to produce ga

13、s A and obtain a colorless solution.II. Dip the platinum wire in the solution of a small amount of I and burn it on the flame without a yellow flame.Add water to the solution obtained in I, adjust pH to 56, produce white precipitate, B, filter.IV. add excess NaOH solution to precipitate B and precip

14、itate all dissolved.V. adding NaOH solution to the filtrate obtained in III, adjusting pH to 12 and obtaining white precipitate C.(1) of A gas can make clear limewater turbid, chemical formula A is _.(2) by I and II X must not contain elements of judgment is p, _ (fill element name).(3) to form an ion is _ III in B equation.(4) B dissolved in ionic equation IV is _.(5) the chemical precipitation of C is _.(6) if the n (A): n (B): n (C) = 1: 1: 3, the chemical formula of X is _