(1) 0.2 g tables 0.2 g Fe 0.2 g mothballs filings salt (ground) Mix Add 2 strips Mg ribbon and a pinch of food coloring Scatter mixture on a piece of paper Pass a magnet Save the underneath separated the paper components
(2) Place mixture Put a piece of perforated (from 1) in a 50 filter paper on top of evap. ml beaker dish containing the residue; place inverted funnel w/ cotton in its tip on the filter paper Add 30 mL of water Heat gently until solids deposit on the Filter walls of the funnel mixture Save deposit on Save the filtrate funnel and residue (mixture in flask); on evap. dish transfer residue to evaporating dish
(3) Boil the filtrate then add pinch of activated charcoal Continue boiling until mixture is about 20 mL Filter the mixture and save filtrate in test tube. Which substance was separated?
(4) To 2 mL filtrate from #3b, add a crystal of Evaporate hexane iodine and shake well layer slowly (in a hood). Identify the residue. Add 1 mL hexane. What is the color of the hexane Evaporate aqueous layer? The aqueous layer? layer to dryness Identify the residue. Separate the two layers using medicine dropper. What method of separation is employed here? What properties of the mixture must be considered in this method of separation?
Place small amounts of Fe,(1) Mg, iodine and mothballs (from part A) in separate test tubes Add 10 drops of 0.1 M HCl. Cover w/ stopper immediately Observe for evolution of gas. Test the gas with a glowing splinter. Which is/are metallic? Nonmetallic?
(2) Heat a piece of Mg ribbon directly over blue flame until it burns Place the ash in a test tube, add 5 mL water and shake the test tube Test for acidity/alkalinity of solution using litmus paper
(3) (to be performed in a hood) Thrust tip of glass Add 1 mL rod over blue flame water for 1 minute Shake test tube and test Dip heated tip into alkalinity/acidity of powdered sulfur placed solution on watch glass Collect the fumes in a test tube and stopper with cork
(1) a b c Place a pinch of Fe, Cool test tube Recall mothballs, food and examine procedure 2coloring and table salt upper portion of and 3 ofin separate 20 mL test the walls of test Part B. tubes tube What type of Heat test tubes with change has taken low flame and place? What are the observe if there are experimental visible results evidences for this type of change?
(2) Place small piece of Fe and Mg in 2 separate test tube Add 10 drops of 0.1 M HCl to each Record your observation What type of change took place?
(3) Place small piece of Fe and Mg in 2 separate test tube Add 10 drops of FeCl3to each Record your observation What type of change took place?
(4) Place all of the filtrate saved from experiment A in an evap. dish Add a piece of red litmus paper. Evaporate to dryness
(1) Fe filings were separated from the mixture -- this is because Fe filings are metallic(2) The residue filtered were mothballs.(3) At first, activated charcoal was suspended in the liquid. It settled at the bottom of the beaker after a while.
(4) b. Color of hexane layer was clear pink. The aqueous layer was clear yellow. c. Solvent-extraction was used to separate the 2 layers. The property of the two liquids to be considered when using this process is that they should be immiscible to each other. d. Residue: e. Residue:
1. Bubble formation was observed in Mg and Fe. Mothballs and iodine were non-metallic while Fe and Mg were metallic.2. The Mg ribbon was basic since the red litmus paper turned blue3. The heated rod went into fire when contact was made with sulfur. The flame on the rod, when placed in the test tube was put out and yellow fumes were collected. When added with water, the solution was found to be acidic.
(1) a. After heating: - iodine was liquefied and turned violet in color. Small crystals appeared on the walls of test tube. - mothballs liquefied and turned orange; moisture and white spots appeared on the test tube wall -in the test tube with Fe, orange precipitates formed on the upper walls of the test tube. - there were no visible reactions in the test tube containing table salt
b. Spots of the substance formed on the upper wall of test tube. Physical reaction occurred.c. Re part B, procedure 2: Chemical reaction occurred, one indication is the solution becoming basic. Part B, procedure 3: Chemical reaction took place; mixture became acidic.
(2) Bubbles were formed indicating chemical change in Fe upon addition of HCl. The formation of bubbles in Mg were faster, meaning the reaction rate was faster in Mg.(3) In Fe, bubbles were formed. In Mg ribbon, the mixture turned yellow then to and bubbles formed.