question #1 please thank you Unknown identification number ____ Qualitative obse

Question

question #1 please

thank you

Unknown identification number ____ Qualitative observations (color, etc.) of unknown ____ Observations on solubility of known solutes ____ Observations on solubility of unknown ___ Describe the method by which you determined the density of the unknown. ____ Describe the method used for the melting - point or boiling - point determination. ___ Melting or boiling (circle) point determined _____ Barometric pressure (for boiling point) ______ Summarize in the following table the properties determined for your unknown sample, along with the properties of the substance you believe your unknown to be. Calculate the percentage difference between the known and unknown substances' properties for each quantitative determination. Substance unknown is believed to be ____ In this experiment, you qualitatively determined whether or not a given solute would dissolve in each of three solvents. Suggest a method by which the solubility of a solute in a solvent might be measured on a quantitative basis.______

Explanation / Answer

1) Take a known volume of solvent.

2) Add known quantity of salt in portions until a saturated solution is formed.

3) If any excess salt is present, filter or decant the solution to remove the salt.

4) Dry the excess salt and weigh.

5) Find the amount of dissolved salt by subtracting the excess amount from intial amount taken.

6) Divide the amount of salt dissolved by volume of solvent taken.

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