Jennifer Liu
2-1
January 19, 2011
Evelyn Korompai
Acid-Base Titration
It was found that when titrating hydrochloric acid with sodium hydroxide, the moles of both compounds are equal, and the molarity of hydrochloric acid is 0.29M.
Purpose:
To titrate hydrochloric acid with sodium hydroxide and to find the molarity of sodium hydroxide.
Materials:
Apparatus
Suction bulb
2 delivery pipets (10 mL)
2 Erlenmeyer flasks (250 mL)
buret
buret clamp and stand
Safety goggles
Reagents
Standardized NaOH solution (approx. 0.52M)
Unknown HCl solution
Phenolphthalein solution
Procedure:
PART 1- DETERMINATION OF MOLARITY OF HYDROCHLORIC ACID SOLUTION
. Put on safety goggles
2. Obtain about 50 mL of the hydrochloric acid solution of unknown concentration and about 100 mL of the standardized NaOH solution. Record the molarity of NaOH in Table 1 .
3. Rinse your pipet with a small amount of HCl first. Then, using a suction bulb, pipet 10.0 mL of the HCl solution into a 250 mL Erlenmeyer flask
4. Add 3 drops of phenolphthalein solution.
2-1
January 19, 2011
Evelyn Korompai
Acid-Base Titration
It was found that when titrating hydrochloric acid with sodium hydroxide, the moles of both compounds are equal, and the molarity of hydrochloric acid is 0.29M.
Purpose:
To titrate hydrochloric acid with sodium hydroxide and to find the molarity of sodium hydroxide.
Materials:
Apparatus
Suction bulb
2 delivery pipets (10 mL)
2 Erlenmeyer flasks (250 mL)
buret
buret clamp and stand
Safety goggles
Reagents
Standardized NaOH solution (approx. 0.52M)
Unknown HCl solution
Phenolphthalein solution
Procedure:
PART 1- DETERMINATION OF MOLARITY OF HYDROCHLORIC ACID SOLUTION
. Put on safety goggles
2. Obtain about 50 mL of the hydrochloric acid solution of unknown concentration and about 100 mL of the standardized NaOH solution. Record the molarity of NaOH in Table 1 .
3. Rinse your pipet with a small amount of HCl first. Then, using a suction bulb, pipet 10.0 mL of the HCl solution into a 250 mL Erlenmeyer flask
4. Add 3 drops of phenolphthalein solution.