2. An alkaline solution of sodium carbonate made up of 0.594% NaOH, 14.88% Na,co, and 84.53% water is causticized by the addition of partly slaked lime. The lime contains Caco,, Cao and Ca(OH),.' The mass obtained from the causticization has the following analysis: 13.48% Caco, 0.28% Ca(OH), 0.61% Na,CO, 10.36% NaOH and the rest is water. The reactions are: Cao + H,0 > Ca(OH), Na,CO, + Ca(OH), → N2OH + Caco, On a basis of 100 kg of the causticized mass, calculate: a) Wt and composition of the lime b) Wt of the alkaline liquor c) % excess reactant d) degree of completion of the overall reaction
2. An alkaline solution of sodium carbonate made up of 0.594% NaOH, 14.88% Na,co, and 84.53% water is causticized by the addition of partly slaked lime. The lime contains Caco,, Cao and Ca(OH),.' The mass obtained from the causticization has the following analysis: 13.48% Caco, 0.28% Ca(OH), 0.61% Na,CO, 10.36% NaOH and the rest is water. The reactions are: Cao + H,0 > Ca(OH), Na,CO, + Ca(OH), → N2OH + Caco, On a basis of 100 kg of the causticized mass, calculate: a) Wt and composition of the lime b) Wt of the alkaline liquor c) % excess reactant d) degree of completion of the overall reaction
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:2. An alkaline solution of sodium carbonate made up of 0.594% NaOH, 14.88% Na,CO, and 84.53%
water is causticized by the addition of partly slaked lime. The lime contains Caco, Cao and
Ca(OH),.' The mass obtained from the causticization has the following analysis: 13.48% Caco,
0.28% Ca(OH), 0.61% Na,CO, 10.36% N2OH and the rest is water. The reactions are:
Cao + H,0 > Ca(OH),
Na,co, + Ca(ОH), оH + Caco,
On a basis of 100 kg of the causticized mass, calculate:
a) Wt and composition of the lime
b) Wt of the alkaline liquor
c) % excess reactant
d) degree of completion of the overall reaction
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