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Lab Report on Titration

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Introduction

Chemistry lab Report Titration Aim: To calculate the concentration of alkali. Background Information: Standard Solution: Standard solution is a chemical term which describes a solution of known concentration. The concentration of the solution is normally expressed in units of moles per Litre Alkali:A base that is soluble in water is known as Alkali. Volume of acid X concentration of acid =1 Volume of alkali X concentration of alkali Apparatus and Materials: * 25 cm3 Pipette * 10 cm3 Burette * Retort stand * Conical Flask * Funnel * 2 Beakers * Marble * Safety Glasses * Distilled water * Alkali * Standard solution of acid phenolphthalein Method: 1) ...read more.

Middle

10) Record the volume of the alkali required to neutralize the acid 11) Repeat the experiment a number of times to obtain precision and accuracy. Data Analysis: Sr. No Volume of Acid-potassium hydrogen phthalate(cm3) Volume of Alkali-sodium hydroxide (cm3) 1. 10 10.3 2. 10 10.2 3. 10 10.1 4. 10 10.3 5. 10 10.2 6. 10 10.2 Calculations: Conc. Of acid Volume of the acid (cm3) Volume of the base (cm3) 0.1 g/ dm3 10 cm3 10.3 cm3 0.1 g/ dm3 10 cm3 10.2 cm3 0.1 g/ dm3 10 cm3 10.1 cm3 0.1 g/ dm3 10 cm3 10.3 cm3 0.1 g/ dm3 10 cm3 10.2 cm3 0.1 g/ dm3 10 cm3 10.2 cm3 Let the concentration of the alkali be 'A' 0.1 x (10 x 6) ...read more.

Conclusion

100 = �0.49% Uncertainty in the volumetric flask: �0.05 cm3 % error in the volumetric flask = (0.05 / (100)) 100 = �0.05% Hence the error in the concentration of the acid is �0.54% Therefore, the total error in the concentration of the alkali = � (0.48+0.036+0.49+0.54) % = � 1.546% Error Analysis: The possible reasons for the error are: * The fluctuating temperatures in the area where the experiment was being conducted caused inaccuracy to the calculations. * There could have been error of parallax while taking the volume of the liquid. * I might have exceeded the neutral mark while adding the alkali to the solution. Conclusion * The concentration of alkali was 0.097 g/ dm3 * There could have been an improvement in the result if certain random errors had not occurred. Pratik Sanghavi IBD-Yr 11 (B2) 1 ...read more.

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