Hello, I was hoping for some help with the prelaboratory questions for Analytical Chemistry. I am pretty sure I got number one, but I was very confused about the "second endpoint" calculations and I am pretty sure I have calculated the percentage wrong. These are the equations we are given to work with and the questions are below. Thanks in advance!Eq. 2 CO32- + H+ Û HCO3- (bicarbonate ion)Eq. 3 HCO3- + H+ Û H2CO3 (carbonic acid)Eq. 4 However: H2CO3 (aq) Û CO2 (g) + H2O How much concentrated HCl acid is required to make 0.500 L of a 0.100 M HCl solution? One can calculate the Molarity (M) of the HCl from the weight percentage on the reagent bottle (which is usually 37.0% (w/w) with a density of 1.19 g/mL).A weight of 1.300 g of sodium carbonate (MW = 105.989 g/mol) is dissolved in 250.0 mL water. If a 25.00 mL aliquot of the sodium carbonate solution is placed into an E-flask and titrated with 0.1034 M HCl, what should be the volume of HCl to reach the second endpoint (bromocresol green indicator)?A 0.2500 g soda ash sample is dissolved in 75.00 mL of double distilled water. This solution was titrated with 0.1034 M HCl and a bromocresol green endpoint gave a volume of 21.16 mL. What is the percent soda ash (as %Na2CO3) that was in the original sample?

Moles of HCl = volume x molarity= 0.500 x 0.1 = 0.05 molMass of HCl = moles x molar mass of HCl=…

Answered: How much concentrated HCl acid is…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Hello, I was hoping for some help with the prelaboratory questions for Analytical Chemistry. I am pretty sure I got number one, but I was very confused about the "second endpoint" calculations and I am pretty sure I have calculated the percentage wrong. These are the equations we are given to work with and the questions are below. Thanks in advance!

Eq. 2 CO₃^2- + H⁺ Û HCO₃^- (bicarbonate ion)

Eq. 3 HCO₃- + H⁺ Û H₂CO₃ (carbonic acid)

Eq. 4 However: H₂CO₃ _(aq) Û CO₂ _(g) + H₂O

How much concentrated HCl acid is required to make 0.500 L of a 0.100 M HCl solution? One can calculate the Molarity (M) of the HCl from the weight percentage on the reagent bottle (which is usually 37.0% (w/w) with a density of 1.19 g/mL).
A weight of 1.300 g of sodium carbonate (MW = 105.989 g/mol) is dissolved in 250.0 mL water. If a 25.00 mL aliquot of the sodium carbonate solution is placed into an E-flask and titrated with 0.1034 M HCl, what should be the volume of HCl to reach the second endpoint (bromocresol green indicator)?
A 0.2500 g soda ash sample is dissolved in 75.00 mL of double distilled water. This solution was titrated with 0.1034 M HCl and a bromocresol green endpoint gave a volume of 21.16 mL. What is the percent soda ash (as %Na₂CO₃) that was in the original sample?

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