How do the concentrations of HC1, OH and \ m Ca2+ relate to each other stoichiom

Question

How do the concentrations of HC1, OH and m Ca2+ relate to each other stoichiometrically at the end- point (end- point identifies the equivalence point) of the acid-base titration? How is this information used to determine Ksp and G degree ? Review writing net ionic equations, which will be a key feature of Exam 3 (Review lecture on this topic is posted on BB). Read the procedure and the Discussion part of the experiment to answer this question. Write the equilibrium reaction for the dissolution of Ca(OH2). Include all phases. Write the net ionic reaction between the acid-base titration in this experiment. Include all phases. Based on your answers parts A and B. what is the stoichiometric relation between HCl : OH ? If your answer is HCl:OH is 2:3, use this format to input your answer: 2,3 Ksp and G degree Based on the information gathered from parts A to E. how would you determine Ksp and G degree ? To get full credit for this question, you need to describe precisely the calculation recipe. I should be able to perform the calculation based on your recipe of calculation. You want to know how to do this calculation; so you will know what to do in the experiment.

Explanation / Answer

a)

The equation dilution for Ca(OH)2 is:

Ca(OH)2(s) ----> Ca+2(aq) + 2OH-(aq)

b)

the net ionic equation of the neutralization:

2H+(aq) + 2OH-(aq) ---> 2H2O(aq)

c)

2 mol of HCl are required per mol of Ca(OH)2

BUT

1 mol of H+ is required per mol of OH-

therefore ratio is 1:1

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