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Unformatted text preview: 10. Add the NaOH slowly while swirling 11. As the endpoint is reached, it will just turn from clear to pink. 12.Repeat the tirtration procedure three or more times until 3 consistent NaOH concentrations are obtained. DON’T THROW AWAY 13. Calculate the morality and compare with other groups Part B: Equivalent Weight of an Unknown Acid. 1. Obtain an unknown solid sample 2. Weigh a flask 3. Weigh again with solid 4. Prepare the solution by adding 50ml of distilled water and .2% of phenol stuff 5. Refill the burett with NaOH 6. HCl will only be need if back titration is needed. 7. Titrate to the endpoing....
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- Spring '08
- standard Hcl solution