An unknown compound is suspected to be acetanilide (mp 113.5-114). What would happen to the melting point if this unknown were mixed with an equal quantity of pure acetanilide?  The melting point would remain close to the authentic sample melting point. none of these answers are correct. the mix sample would show a melting point elevation. the mix sample would show a melting point depression.

1. A vial containing an unknown sample is suspected to be one of the following compounds (mp.): urea (~133 °C), 2,4-dimethylacetanilide (~133 °C), phenacetin (~134°C) or 3-chlorobenzamide (~134 °C). A list of melting points taken on a machine when the 50% of the unknown by volume has been mixed with 50% each of the possibilities is shown in the following table: Melting point (°C) of mixture Substance mixed with unknown (50% each) urea 133.5-134.0 2,4-dimethylacetanilide phenacetin 3-chlorobenzamide 108.6-128.1 105.7-120.4 120.3-130.5 Identify the unknown and explain your reasoning, using the notes you have taken in the lab.

COMMON ION EFFECT   Place approximately 5 mL of saturated NaCl(aq) into each of 4 test tubes. NaCl (aq) can be dispensed from the burette labelled NaCl. If necessary, add NaCl to the burette from the beaker labelled NaCl. From the burette, dispense about 2.5 mL of distilled water into each of the two empty test tubes. Add several scoops of NaC2H3O2 to one of the test tubes containing water. Stopper and shake. Continue to add NaC2H3O2, stopper, and shake until a saturated solution is achieved (some NaC2H3O2 does not dissolve). To the last test tube (containing 2.5 mL distilled H2O), add several scoops of AgNO3. Stopper and shake. Continue to add AgNO3, stopper, and shake until a saturated solution is achieved. 5.Add some of the liquid from the saturated NaC2H3O2 solution to a test tube A containing NaCl(aq). Be careful not to add any solid NaC2H3O2. Record your observations. 6.Add some of the liquid from the saturated AgNO3 solution to a test tube B containing NaCl(aq). Be careful not…

help with 2 (a-c)