Laboratory Report Sheetexperiment

Part A. Equilibrium characteristics of different water samples (Corresponds to results from Part B of experimental procedure)

Experimental data.

1 ) pH measurement

WATER SAMPLE

pH

Temperature, °C

Sample A (prepared days ago)

Sample B (prepared days ago; closed system )

Sample C (prepared h ago)

Sample D (prepared days ago)

Sample E (saturated calcium bicarbonate solution)

( source: )

2) Alkalinity measurement:

Titrant:_

Titrant concentration:_

Sample volume:_

Indicators:_ and

WATER SAMPLE

mL of titrant for P-alkalinity

P-alkalinity, mg/L CaCOj,

mL of titrant for total alkalinity

Total alkalinity, mg/L CaCOi

Total alkalinity, mol/L

Sample A

Sample B

Sample C

Sample D

Sample E

Sample F

Using the common equations based on the titration volumes, calculate:

WATER

[0H~],

[co\-j,

[HCO^l,

[H]+,

SAMPLE

mol/L

mol/L

mol/L

mol/L

Sample A

Sample B

Sample C

Sample D

Sample E

Sample F

Include all equations and an example of your calculations.

Include all equations and an example of your calculations.

3) Calcium concentration

Titrant:_

Titrant concentration:_

Indicators:_

Sample volume:_

WATER

[Ca2+] concentration,

[Ca2+] conc.

Sample

mL of titrant

mg/L CaCOs

mol/L

Sample A

Sample B

Sample C

Sample D

Sample E

Sample F

Equation and sample calculation:

Equation and sample calculation:

4) Total dissolved solids

Sample volume:_mL

Weight of

Total dissolved

Total dissolved

WATER

Weight of dry

beaker with

solids in

solids (TDS),

SAMPLE

empty beaker, g

dried sample, g

sample, mg

mg/L

Sample A

Sample B

Sample C

Sample D

Sample E

Sample F

Sample calculation

Part B. Effect ofpH on the solubility and equilibrium of calcium carbonate Experimental data

I) pH and temperature measurement

WATER SAMPLE

Reactant added

mL added

pH

Temp., K

Treated sample 1

Treated sample 2

Treated sample 3

Treated sample 4

Treated sample 5

Treated sample 6

2) Alkalinity measurement:

Titrant:_

Titrant concentration:_

Sample volume:_

Indicators:_ and

WATER SAMPLE

mL of titrant for P-alkalinity

P-alkalinity, mg/L CaC03

mL of titrant for total alkalinity

Total alkalinity mg/L

CaC03

Total alkalinity mol/L

Treated sample I

Treated sample 2

Treated sample 3

Treated sample 4

Treated sample 5

Treated sample 6

Using the common equations based on the titration volumes, calculate:

WATER

[OH-J,

[co32~],

[HCO3-],

[H]+,

SAMPLE

mol/L

mol/L

mol/L

mol/L

Treated sample 1

Treated sample 2

Treated sample 3

Treated sample 4

Treated sample 5

Treated sample 6

Include all equations and an example of calculations.

Include all equations and an example of calculations.

3) Calcium concentration

Titrant:_

Tit rant concentration:_

Indicator:_

Sample volume:_

WATER

[Ca2+] conc.,

[Ca2+] conc.,

SAMPLE

mL of titrant

mg/L CaCOi

mol/L

Treated sample 1

Treated sample 2

Treated sample 3

Treated sample 4

Treated sample 5

Treated sample 6

Equation and sample calculation:

Equation and sample calculation:

4) Total dissolved solids

Sample volume:_mL

WATER SAMPLE

Weight of dry empty beaker, g

Weight of beaker with dried sample, g

Total dissolved solids in sample, mg

Total dissolved solids (TDS), mg/L

Treated sample 1

Treated sample 2

Treated sample 3

Treated sample 4

Treated sample 5

Treated sample 6

Example of calculation:

Example of calculation:

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