A student collected the following temperature-solubility data for ammonium chlor

Question

A student collected the following temperature-solubility data for ammonium chloride (NH_4 CI) dissolved in water by observing the temperature appear in the solution. Mass of water used to dissolved each NH4CI sample: 5.0 g Calculate the solubility of NH_4 CI, in grams of NH_4 CI per 100 g of water, for each saturation temperature. Enter these values on the data table above Prepare a Solubility-temperature curve for NH_4 CI using a computer program and determine the solubility of NH_4 CI at 40 degrees C. Briefly describe the hazard you should avoid when stirring a solution in a test tube suspended in a hot-water bath.

Explanation / Answer

S.No

Amount of NH4Cl dissolved ,g

Temperature of crystalization, deg.c

Solubility, g NH4Cl/100gm of water

1

3.5

87.8

3.5/100=0.035

2

3.0

59.5

3/100=0.030

3

2.5

51.5

2.5/100=0.025

4

2.0

30.4

2/100=0.02

The variation of solubility with respect to temperature is

S.No

Amount of NH4Cl dissolved ,g

Temperature of crystalization, deg.c

Solubility, g NH4Cl/100gm of water

1

3.5

87.8

3.5/100=0.035

2

3.0

59.5

3/100=0.030

3

2.5

51.5

2.5/100=0.025

4

2.0

30.4

2/100=0.02

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