LAB ON TITRATION AND
NUETROLIZATION
MADE BY BENAZIR AYAMY
TEACHER MR. VINCET
CLASS GRADE 12 COLLEGE PREPRATION
INTRODUCTION
The acid-base titration is the determiantion of concentration of an acid or
base by nuetulizing the acid/base with an acid or base of unkown
concentration. Titration is the volumetric chemical analysis to determine the
concentration of a substance in solution.neutrulization is a reaction to
nuetrolize the acid with base or the base with acid. In this experiment we
are using HCL to nuetrolize NAOH and indicator phenolphthalein, that
change the colour the point that the colour change is called endpoint.
MATERIAL
Apparatus:
1. volumetric flask
2. 10mL measuring cylinder
3. Pipette
4. 50mL burette
5. Beaker
6. Erlenmeyer flask
7. Retord stand
8. White tile
9. Stopwatch
10. Pipette bulb
Chemicals:
1 NAOH solution
2. 0.09M HCL solution
3. Distilled water
4. Phenolphthalein
PROCEDURE
GIVEN IN ABOVE
OBSERVATION
READING
VOLUME OF HCL
V1
FINAL BURETTE
READING
VOLUME OF HCL
V2
VOLUME OF ACID
CONSUMED (ml)
TITRANT
V= V2-V1
10ml
0
12.3
V=12.3-0=12.3
2
10ml
0
11.9
V=11.9-0=11.9
3
10ml
0
11.8
V=11.8-0=11.8
TRIAL NUMBER VOLUME OF
ALKALI (ml)
INITIAL BURETTE
1
While doing this experiment when we add phenolphthalein to the
NAOH the color of base change to pink but by adding HCL the
color change slightly to bright pink at the end by adding one drop
of HCL the color of NAOH totally change to white so we saw that
how HCL neutralize the NAOH.
CALCULATION
CIVI=CFVF
CI*10ml=0.09M*12ml
CI= 0.09M*12ml/10ml
CI=0.108M
CI Represent the no of concentration of NAOH or the Morality (0.108M)
C=n/v
n=c*v
n=0.108M*12ml
n=1.296M/ml
MmNAOH= (22.98+16+1.01)
MmNAOH= 40.01gr/mol (the Molor mass of NAOH)
n=m/Mm
m=n*Mm
m=1.296M/ml*40.01gr/mol
m=51.9gr (the mass of NAOH present in 1Liter)
CONCLUSION
In conclusion we can say or we find that how does the titration
and neutralization happen and how and acid neutralize the base.
DISCUSSION
TITRANT during titration the solution in burette called the
TITRANT. The three indicators that we can use are (methyl
orange, bramothymol blue and phenolphthalein). End point is the
point when the color of base was change at the end by adding
one drop acid to the base the color of base totally changes to
natural. By washing Erlenmeyer flask yes it will effect to the
concentration of NAOH.
SOURCE OF EXPERIMENT ERROR
The error can be while we are pipetting the acid or the base we
didn’t do it correctly. In titration we forgot to do the titration of
pipette before taking the acid or the base. The biker that we are
using is not properly dry and while adding acid to the base we
were not doing that properly because it need more patience we
have add a very little amount each time and at the end when the
color is slightly bright so we have to be careful to the last drop.