acid base reaction and titration

1. Explanation about the aplication of acid-base reaction
a. In medical field
In medical field the principal of acid base reaction is used to threat abnormal acidity in a stomach, the abnormal acidity in a stomach is caused by excessive acidity in an environtment of the stomach. Stomach can produce hidrocloric acid and pepsin (digestion hormon). The acid function is to help food digestion.to deacreas the excessive acidity in stomach, we can be used antacid. Antacid containt base compound or base salt. The more base the atacyd as the more acid that can be neutralizied, so that the treatment will be more efektif. Some base compound are magnesium hydroxide, aluminium hydroxide, aluminium carbonate etc.
The principle of acid base reaction can also be used to threat bee stings.bee sting also contains base compounds. Acid in bee stings can be neutralized by spreading base compounds(lebah) or acid compounds (tawon)
b. In agriculture
The more acid an a soil the fertile of the soil be less the soil will be, acid soil can be fertilized by neutralizing the soil with calcification. Calcification is spread CaCO3 and MgCO3 over the soil, CaCO3 will be Ca(OH)2 and MgCO3 will be Mg(OH)2 which can neutralized acid soil.
The fertily of soils is also related with alkali. Base soils can be neutralized by adding sulfur or high level acidity of organic compounds.the addition sulfur will neutralize base soils.





1. Example of acid and base reaction
a. Strong acid and strong base
HCl + NaOH NaCl + H2O
2HCl + Mg(OH)2 MgCl2 + 2H2O
H2SO4 + Mg(OH)2 MgSO4 + 2H2O
b. Strong base and weak acid
CH3COOH + NaOH CH3COONa + H2O
H3PO4 + 3NaOH Na3PO4 + 3H2O
c. Strong acid and weak base
HCl + NH4OH NH4Cl + H2O
H2SO4 + NH4OH NH4SO4 + H2O
d. Weak acid and weak base
CH3COOH + NH4OH CH3COONH4 + H2O

2. How to do titration
1.prepare the equipment (burette, stative and strap and erlenmeyer)
2.prepare standard solution that diluted by adding aquadesh in a certain volume.
3.placed a reagent of known concentration in a burette (titrant/titrator)
4.solution whose concentration will be determined is placed into erlenmeyer (volume and concentration titrant must be already known)
5. drop acid base indicator into analyte
6.drop titrant slowly into analyte and stop dropping when the end point of titration has been achieved
7. the end point of titration can be known from the change of color in the indicator solution.
8. when the indicator change the color, the dropping from the burette must be stopped.
formula :
V1 . aM1 = V2.bM

Where :
V1 : volume of titrant (mL)
V2 : volume of analyte (mL)
M1 : concentration of titrant (M)
M2 : concentration of analyte (M)
a : valence of titrant
b : valence of analyte


fadilla azhar
XI IPA2