Stahl, NaOH Standardization Post Lab - Ashlynn Stahl NaOH...

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Ashlynn Stahl 11/30/19 NaOH Standardization Post Lab How many grams of KHP can be reacted with 17.6 g NaOH? Show your work MW of NaOH = 39.997 g/mol MW of KHP = 204.22 g/mol ( 17.6 gNaOH )( 1 mol NaOH / 39.997 gm NaOH )( 1 KHP / 1 NaOH )( 204.22 gm of KHP / 1 mol KHP ) ¿ 89.9 g / mole KHP If you continue to titrate the KHP solution past the equivalence point, what will happen to the color? Explain why. If we continue to titrate the KHP past the equivalence point the pink color will be brighter because once the solution is at the equivalence point all of the KHP has reacted with NaOH so now the NaOH can react with the indicator. every time the indicator becomes ionized the molecule is pink so when we add more NaOH, the more ionized pink molecules are generated. If, after titration, the KHP solution was left in contact with the air in the room, it will
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Unformatted text preview: eventually lose its color. Explain why and include two balanced equations. Explain why the volume of water used to dissolve the KHP does not need to be carefully measured? We don’t need to have exact measurements of the volume of water used because what we really needed to know for the experiment to work was the number of moles of KHP we needed to find the standardized concentration. enter you data Trial 1 Trial 2 Trial 3 Mass KHP (g) Moles of KHP (mol) Starting volume of buret (mL) Ending volume of buret (mL) Volume of NaOH delivered (mL) Moles of NaOH delivered (mol) Volume of NaOH delivered (L) Concentration of NaOH (mol/L) or (M) Average concentration of NaOH (mol/L) or (M) Class average concentration of NaOH (mol/L) or (M) Percent error from class average...
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