Acid-Base Titration Lab Report Essay

795 Words Oct 26th, 2012 4 Pages
Acid-Base Titration
BQ: 1) what is the strength of the antacid?
2) How accurate/precise is this strength?
Safety consideration:
Goggles and gloves must be worn at all time during experiment to prevent any contact with eyes and skin. If spilled any chemical in gloves throw it away and wear a new one immediately. Handle all chemical carefully. Handle all carefully to prevent from breaking.
Procedure and Tests:
Week 1 1) 600ml of a 0.5M NaOH solution will be needed, 3MNaOH is provided. Determine how much of the 3M NaOH will be needed. 2) Determine how many mls of a 0.5M NaOH solution will be required to titrate 1.2g of potassium hydrogen phthalate to the nolphthalein endpoint. 3) Use bromothymol blue or
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Trials | Mass of tablets (g) | Volume of NaOH(mL) | Moles of NaOH | Moles of HCl | Moles of OH- | 1 | 1.194 | 15.8 | 0.008 | 0.011 | 0.003 | 2 | 1.199 | 19.0 | 0.009 | 0.011 | 0.002 | 3 | 1.215 | 13.5 | 0.007 | 0.011 | 0.004 | | | | | | Average = 0.003 | | | | | | Derivation = 0.001 |

Calculations:
Mole of KHP= mole of NaOH (use for column 3 on table 1)
Moles of NaOH= moles of HCl(use for column 3 on table 2)
Moles of OH-= moles of HCl-moles of NaOH(use for column 4 on table 3)
Price per mole
Price of one pack=$33.03
500 tablets in one pack.
$33.03/500tblt = $.0606 per tablet $ 20.2 per mole of OH- |
$.0606/.003M=

Claims: both beginning questions are asking about the strength of the antacid, based on table 3, it can be concluded that the strength is 0.003 moles. On this experiment accuracy is based on how accurate the mole of NaOH and HCl are, and the volume of NaOH that were used in each trial.
Evidence and Analysis: 1) What is the strength of the antacid?
The strength of

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