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）.doc

高二学生下学期化学学****计划模板范文05月12日(Sophomore students chemistry study plan next term, model 05, 12)
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(3) there are indigenous people with excess stomach acid treatment, the method is: wash the egg shell, burning, grinding taking. The treatment is said to work well. Please use the knowledge you have learned to analyze the truth. _________________________________________________________________
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(4) sodium hydroxide can neutralize gastric acid. Why not use sodium hydroxide to treat gastric acid excess? _______________________________________________________________.
The ponent analysis of acid is hydrochloric 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===CO2 hav'e 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 digestive tract
10. 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 l4, 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 s