Available is a white powdered descaling agent containing solid sulfamic acid.The aim of this exercise is to determine the percent composition by mass of sulfamic acid in this descalingagent.Given :sulfamic acid, of formula NH2SO3H, is denoted by HA in this exercise.Molar mass of sulfamic acid in g.mol: M = 97.1Experimental Procedure :-First step: a mass m = 2.05 g of this descaling agent is disolved in distilled water in order to obtain asolution (S) of volume V = 500 mL.-Second step : a volume Va = 10 mL of the solution (S) is poured into a beaker. Then a volume V´ ofdistilled water is added in order to immerse properly the pH-meter electrode.- Third step : the pH metric titration is carried out using a sodium hydroxide solution ofconcentration C = 4,0x10² mol.L!.1. Prelimanry StudySulfamic acid is a strong acid. Write the equation of its reaction with water.List the appropriate material needed to :1.1-1.2-Weigh the mass m of 2.05 g ; - add the sodium hydroxide solution.o Take the volume Va;- prepare the volume V ;Write the equation of the titration reaction of sulfamic acid.Based on the chemical species present in solution at equivalence, justify the pH value of 7found at equivalence.1.3-1.4-2- Make-use of the result of the titrationGiven below, some of the results of the titration:Vb (mL)10.415pHplot the shape of the curve pH = f(Vb) for 0 < Vb< 15 mL. Take the following scales:In abscissa: 1cm for 1mL,In ordinates: 1 cm for 1 pH unit.Determine the concentration Ca of the sulfamic acid solution (S).2.47.011.02.1-2.2-2.3-Deduce the percent mass composition of sulfamic acid in this descaling agent.3- Effect of dilution on the pH metric studyA solution (S) of descaling agent is prepared by diluting 10 times the solution (S).3.1.Choose, by justifying, among the following sets, the most precise one needed to carry out therequired dilution.Set -1Set – 2Set – 310 mL Volumetric pipet10 mL graduatedсylinder200 mL volumetric flask10 mL Volumetric pipet100 mL Beaker.100 mL volumetricflask.

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1. Prelimanry Study Sulfamic acid is a strong acid. Write the equation of its reaction with water. List the appropriate material needed to : 1.1- 1.2- o Weigh the mass m of 2.05 g; - add the sodium hydroxide solution. o Take the volume Va; - prepare the volume V ; 1.3- Write the equation of the titration reaction of sulfamic acid. Based on the chemical species present in solution at equivalence, justify the pH value of 7 found at equivalence. 1.4- 2. Make-use of the result of the titration

1. Prelimanry Study Sulfamic acid is a strong acid. Write the equation of its reaction with water. List the appropriate material needed to : 1.1- 1.2- o Weigh the mass m of 2.05 g; - add the sodium hydroxide solution. o Take the volume Va; - prepare the volume V ; 1.3- Write the equation of the titration reaction of sulfamic acid. Based on the chemical species present in solution at equivalence, justify the pH value of 7 found at equivalence. 1.4- 2. Make-use of the result of the titration

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter9: Chemical Quantities

Section: Chapter Questions

Problem 100CP: he production capacity for acrylonitrile (C3H3N)in the United States is over 2 billion pounds per...

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