Data Analysis Elements Density

Aluminum 2.698 g/mL

Calcium 1.54 g/mL

Iron

7.8738 g/mL

Silicon 2.3296 g/mL

Question:

Your teacher hands you a small sample of a mystery metal and the chart seen here. Available to you for lab use are: ruler, 100mL

graduated cylinder, 100 ml beaker, bunsen burner, analytical balance, and a crucible. Using only the materials provided:

explain how you would measure the properties needed for determining density:

using your own hypothetical data from the above procedure, calculate the density of a sample; and

use your calculations to show how you would determine the identity of the sample.

Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?

What happens when the temperature of a solution increases?

Straightforward questions answered in the powerpoint slidesreaction: heating the starting materials under refluxwhat does it mean to heat under reflux? why do we choose water as the reflux solvent? what are boiling chips used for? why do we put a condenser on top of the reaction? why do we add heat and let the reaction stir for 30 minutes? why do we add sulfuric acid to the reaction after it cools as opposed to when it’s still hot? separation: filtration of precipitatewhy don’t we do an aqueous and organic extraction in the separatory funnel? why do you rinse the salicylic acid on the filter with ice cold water? purification: recrystallization of salicylic acid (no hot filtration needed)what is the difference in the amount of room temperature water vs. boiling water needed to dissolve the salicylic acid (assume a 1.2 gram yield of salicylic acid)? remember, in the lab if you need x ml of boiling water to dissolve a solid, then you should add a little more (definitely no more than 1.5 times the theoretical amount) to ensure it doesn’t recrystallize prematurely.analysis: melting point of salicylic acidwhat can you conclude if the melting point of the salicylic acid you just synthesized is 152-155oc and the 1: 1 mix of your product and “synthetic” salicylic acid is 151-154oc?