lab10report - Carla Paulo Exercise 10 Potentiometric...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Carla Paulo Exercise 10 Potentiometric Titration Purpose: To titrate a solution of sodium carbonate with hydrochloric acid and to determine the pH using potentiometric analysis and to determine the percentage of Na 2 CO 3 in unknown. Unknown #: 10C 40% Important Equations: CO 3 2- + H 2 0 HCO 3 - + OH - CO 3 2- + H 3 0 + HCO 3 - + H 2 O E = E’ – 2.303(RT/nF)log[H + ] 1 /[H + ] 2 Safety Factors: Gloves and goggles must always be worn. Use only deionized water for the experiment. Raw Data: A. Preparation of Unknown Beaker 1 Mass Vial Initial (g) 18.4993 Mass Vial Final (g) 18.0710 Total Mass (g) 0.4283 B. Titration Data d1= 33.65mL d2= 33.65mL Treatment of Results: 1. Percent of Na 2 CO 3 in the sample. 33.65mLx(1L/1000mL)x(0.100mol HCl/1L)x(1mol H 3 O + /2mol HCl)x (1mol CO 3 2- /1mol H 3 O + )x (1mol Na 2 CO 3 /1mol CO 3 2- )x(107.99g/1mol Na 2 CO 3 )= 0.1817g Na 2 CO 3 %Na 2 CO 3 = (0.1817g/0.4283g)x100= 42.42% 2. Describe how to obtain the second derivative. To obtain the second derivative, I used the first derivative of the second endpoint by
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/07/2011 for the course CHEM 328 taught by Professor Soriaga during the Spring '10 term at Texas A&M.

Page1 / 2

lab10report - Carla Paulo Exercise 10 Potentiometric...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online