In the lime soda process at one time used in large scale municipal water softening, calcium hydroxide

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In the lime soda process at one time used in large scale municipal water softening, calcium hydroxide prepared from lime and sodium carbonate are added to precipitate Ca²⁺ as CaCO₃(s) and Mg²⁺ as Mg(OH)₂ (s):

Ca²⁺(aq) + CO₃^2-(aq) ⇌ CaCO₃(s)

Mg²⁺(aq) + 2OH^-(aq) ⇌ MgOH₂ (aq)

How many moles of Ca(OH)₂ and Na₂CO₃ should be added to soften 1200L of water in which

[Ca²⁺] = 5.0 × 10^-4 M

[Mg²⁺] = 7.0 × 10^-4 M?

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Chemistry The Central Science

ISBN: 9780321910417

13th Edition

Authors: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus

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Question Posted: Oct 27, 2020 07:18 AM

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In the lime soda process at one time used in large scale municipal water softening, calcium hydroxide

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042 mol CaOH 2 removes 042 mol of the 060 mol Ca 2 aq in the sample Th...View the full answer

Chemistry The Central Science

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