Titration of Calcium HydroxideG

Calcium Hydroxide Titrated with Hydrochloric Acid

By: Juliana Kadiasi

Signature__________________________________________

(Experimental team: Ashley Tsao, Sophie Alvarez, Catherine Hering)

IB Chemistry HL
B3
For: Mr. Ahmed. Belmir

15 September 2014
Criteria
Aspect
IA

IA Total
Design
1. Identified Problem & relevant variables

2. Procedure controls variables

3. Procedure & relevant sufficient data

Data Collection & Processing
1. Precise & accurate raw data

2. Processed correctly

3. Processed data presented to aide interpretation with appropriate uncertainty.

Conclusion & Evaluation
1. Reasonable conclusion with justification

2. Evaluation of weaknesses & limitations

3. Realistic relevant improvements

Quantitative Data:
Volume Hydrogen Chloride Solution with a concentration of 0.05 mol/dm3 used to neutralize Calcium Hydroxide with unknown concentration
Trial:
Initial Volume
(v/cm3) ± 0.05 cm3
Final Volume
(v/cm3)±0.05 cm3
Volume Hydrochloric Acid Used
(v/cm3)±0.1 cm3
Volume of Calcium Hydroxide Used (v/cm3) +0.1 cm3
1
38.65
47.10
8.45
10.0
2
17.55
26.00
8.45
10.0
3
26.00
34.55
8.55
10.0
4
34.55
43.00
8.45
10.0
5
14.15
27.70
8.55
10.0
*there is an assumption that there isn’t an uncertainty for HCl solution*
Balanced equation for hydrochloric acid and calcium hydroxide: Ca(OH)2 + 2HCl → CaCl2 + 2H2O
Qualitative Data:
The dark pink color the indicator gave it immediately vanished after a specific amount of Hydrochloric Acid was added by titration into the solution of Calcium Hydroxide.
Due to this being an exothermic reaction, it has been assumed that the temperature of the reaction had increased.
DCP2:
Averages for the ∆volume: (VfVi)
Given: See chart above.
Unknown: Average the Volume of the Hydrochloric Acid Used
Equation: Addition and Division. % uncertainty =
Substitute: 8.45 + 8.45 + 8.55 + 8.45 + 8.45 +8.55 = 42.45