A student obtained a homogeneous solid mixture of unknown composition. The unknown mixture

can consist of any combination of the following: sand, salt, and a compound known as salicylic

acid. To identify the mixture$$s components, read below for the procedural steps along with the

student$$s data.

Solubility Tests

The student obtained six clean test tubes and mixed the following:

Test tube $1$: sand $+$ water

Test tube $2$: salt $+$ water

Test tube $3$: salicylic acid $+$ water

Test tube $4$: sand $+$ ethanol

Test tube $5$: salt $+$ ethanol

Test tube $6$: salicylic acid $+$ ethanol

Here are the student$$s observations after mixing:

Test tube $1$: heterogeneous mixture

Test tube $2$: homogeneous mixture

Test tube $3$: heterogeneous mixture

Test tube $4$: heterogeneous mixture

Test tube $5$: heterogeneous mixture

Test tube $6$: homogeneous mixture

Mixture Separation PART $1$

$1.$ The student placed a small amount of their unknown mixture into a clean test tube.

$2.$ To this test tube, some warm ethanol was added and thoroughly mixed.

$3.$ The entire solution was then filtered through a funnel that was fitted with filter paper, and

the filtrate was collected in a clean flask. The filter paper$/$funnel was saved for Part $2.$

$4.$ The filtrate was transferred to an evaporation dish. The dish was heated, allowing all of the

ethanol to evaporate.

Mixture Separation PART $2$

$1.$ The student added hot water to the same filter paper$/$funnel setup from PART $1.$ The filtrate

was collected in a clean flask.

$2.$ The flask was transferred to a clean evaporation dish. The dish was heated, allowing for all

the water to evaporate.

$2$

Student Name: $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

Here are the student$$s observations$/$data:

Part $1$ mixture separation:

A solid residue remained in the filter paper after filtration with warm ethanol.

A solid residue remained in the evaporation dish after all ethanol evaporated.

Part $2$ mixture separation:

No residue remained in the filter paper after filtration with hot water.

Solid residue remained in the evaporation dish after all the water evaporated.

Post$-$Lab questions:

$1.$ Part $1$ mixture:

a$.$ Identify the possible solid$($s$)$ left behind in the filter paper after filtration with ethanol. Explain

briefly.

b$.$ Identify the possible solid$($s$)$ left behind in the evaporation dish after all ethanol evaporated.

Explain briefly.

$2.$ Part $2$ mixture:

a$.$ Identify the possible solid$($s$)$ left behind in the evaporation dish after all water evaporated.

Explain briefly,

$3.$ Identify all components in the original unknown mixture:

Enter all responses in the appropriate places and submit page $2$ on Canvas as a PDF file by