A NAOH solution with an approximate concentration of 0.1 mol / L was produced in the laboratory. In order to obtain the exact concentration of this solution, its standardization was carried out, using a standard solution of oxalic acid (0.05 mol / L) and phenolpholine as an acid base indicator. The data obtained with the standardization were: H;C_0, + NaOH - Na* + C,0;- + H,0 Va = 10.00 mL, volume of NaOH solution added to the flask; Pv = 11.77 mL, spent volume of standard solution; Pv = 0.05, concentration of the standard solution; The unbalanced reaction of the system is shown below: From the data that was presented, answer: a) What is the real value of the concentration of NaOH (Ca). Present all the calculations and explanations necessary to arrive at the Ca value. b) Explain in a succinct way all the steps, experimental apparatus and necessary care to carry out a standardization experiment in the laboratory, based on the data presented in the statement
A NAOH solution with an approximate concentration of 0.1 mol / L was produced in the laboratory. In order to obtain the exact concentration of this solution, its standardization was carried out, using a standard solution of oxalic acid (0.05 mol / L) and phenolpholine as an acid base indicator. The data obtained with the standardization were: H;C_0, + NaOH - Na* + C,0;- + H,0 Va = 10.00 mL, volume of NaOH solution added to the flask; Pv = 11.77 mL, spent volume of standard solution; Pv = 0.05, concentration of the standard solution; The unbalanced reaction of the system is shown below: From the data that was presented, answer: a) What is the real value of the concentration of NaOH (Ca). Present all the calculations and explanations necessary to arrive at the Ca value. b) Explain in a succinct way all the steps, experimental apparatus and necessary care to carry out a standardization experiment in the laboratory, based on the data presented in the statement
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
Problem 99AP
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H2C2O4 + NaOH ➙ Na+ +C2O42- + H2O
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