1
answer
0
watching
701
views
19 Nov 2019
EXPERIMENT: 7 ANALYSIS OF UNKNOWN ACIDS BY ACID/BASE TITRATION (PARTII) Materials Required: 50 mL buret with clamp and stand phenolphthalein indicator 0.100 M sodium hydroxide (NaOH) unknown citrie acid (CHs0) sample SAFETY PRECAUTIONS: EYE PROTECTION MUST BE WORN AT ALL TIMES IN LABORATORY IF YOU SPILL ACID OR BASE ON YOU, IMMEDIATELY WASH WITH WATER NOTIFY YOUR INSTRUCTOR. PROCEED TO THE NEAREST SAFETY SHOWER IF NECESSARY Background: In a titration, the concentration of a substance in a solution is measured through the reaction with a known stoichiometric amount of another reagent. In this experiment, the amount of citric acid in an unknown mixture will be analyzed in the same way. The balanced chemical equation for the neutralization of citric acid with sodium hydroxide is as follows: + 3H00) Citric Acid From the measured volume of sodium hydroxide needed to reach the equivalence point, the concentration of the unknown citric acid mixture can be determined using the following mathematical equation: Where a and b are stoichiometric coefficients of the acid and base, respectively. VA and Vg are the volumes of the acid and base used in the titration and Mg is concentration of the base. ve 41 a.
EXPERIMENT: 7 ANALYSIS OF UNKNOWN ACIDS BY ACID/BASE TITRATION (PARTII) Materials Required: 50 mL buret with clamp and stand phenolphthalein indicator 0.100 M sodium hydroxide (NaOH) unknown citrie acid (CHs0) sample SAFETY PRECAUTIONS: EYE PROTECTION MUST BE WORN AT ALL TIMES IN LABORATORY IF YOU SPILL ACID OR BASE ON YOU, IMMEDIATELY WASH WITH WATER NOTIFY YOUR INSTRUCTOR. PROCEED TO THE NEAREST SAFETY SHOWER IF NECESSARY Background: In a titration, the concentration of a substance in a solution is measured through the reaction with a known stoichiometric amount of another reagent. In this experiment, the amount of citric acid in an unknown mixture will be analyzed in the same way. The balanced chemical equation for the neutralization of citric acid with sodium hydroxide is as follows: + 3H00) Citric Acid From the measured volume of sodium hydroxide needed to reach the equivalence point, the concentration of the unknown citric acid mixture can be determined using the following mathematical equation: Where a and b are stoichiometric coefficients of the acid and base, respectively. VA and Vg are the volumes of the acid and base used in the titration and Mg is concentration of the base. ve 41 a.
Lelia LubowitzLv2
10 Jan 2019