Postlaboratory Results And Discussionpart A

For each sample calculate the pHs and the other parameters requested.

WATER SAMPLE

Ionic strength

logical

loglHCO,-

Temp., K

pKa2

PKsp

Sample A

Sample B

Sample C

Sample D

Sample E

Sample F

WATER SAMPLE

pCa2+

pAlk

PHS

pH

Langelier Index

Ryznar Index

Sample A

Sample B

Sample C

Sample D

Sample E

Sample F

WATER SAMPLE

Reaction quotient, Q

A G°

AG

Driving Force Index, DFI

Sample A

Sample B

Sample C

Sample D

Sample E

Sample F

Based on the above results, state your conclusions with respect to the characteristics of the solutions analyzed and classify each one. Justify each answer, on the basis of the values calculated and those measured.

Has the solution

What is the

Classification

Classification

reached

tendency of

according to

according to

WATER SAMPLE

equilibrium?

the solution ?

Langelier Index

Ryznar Index

Sample A

Sample B

Sample C

Sample D

Sample E

Sample F

What are the differences between solutions A and B? What causes them?

What differences are observed among solutions A, C, and D? Is there a tendency with respect to the time elapsed since preparation?

What differences are noted between solutions A and E? What may have caused these differences?

According to your results, can the water source of Sample F be considered acceptable? Why?

How would the values change if the Langelier simplification of considering [Alk] = [HCOwere substituted for the true calculated value? How much would it affect the result? Which result is more reliable?

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