I.
II.
Title: Iodine + Iodine Diatomic Model
Introduction:
Zinc + Iodine Reaction
RQ. Why is iodine a diatomic molecule just like hydrogen, nitrogen, oxygen, fluorine, chlorine, and bromine?
What happens when zinc reacts with an iodine atom on an atomic level?
Concept Map
III.
Method: Iodine and the product of zinc and iodine are very toxic.
Safety: Wear goggles throughout. Do not throw product down the sink
1. a) Obtain 10 ml of distilled water in large test tube
b) Place approximately 1.0 grams of iodine in the water.
c) Clamp your test tube to a stand.
d) Using an alcohol thermometer determine the initial temperature of the water iodine mixture.
e) Stir the mixture to dissolve the iodine.
2. a) Add approximately 1.0 g of zinc to the water.
b) Stir the mixture.
c) Record the final temperature of the water, zinc and iodine reaction mixture.
3. a) Pour off the solution produced into a small beaker. Add 20 mL of distilled water to the beaker.
b) Test the conductivity of the solution
c) Note the appearance of your conductivity test wires after the experiment.
4. Mr Z. will dispose of your sample.
IV. Results
1. Record the BDA and temperature changes.
V.
Conclusion:
1.
Determine the number of cal and joules absorbed by or released to the water as a result of the reaction
H = mwater (Twater) 1 cal g oC
2
How many protons, electrons, neutrons does an atom of 131
and in 65 ?
Zn
53
30
53p,53e,78n
30p,30e,35n
I
3. a)What is the expanded electron configuration of iodine, short hand electron configuration of iodine, electron
configuration of iodine based on the previous noble gas, electron dot diagram of iodine
1s22s22px22py2 2pz23s23px 23py23pz2 4s23dxy 23dxz23dyz 23dx2-y223dz224px24py24pz2 5s2 4dxy2 4dxz2 4dyz2 4dx2-y22 4dz22 5px25py2 5pz1
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p5
[ 36Kr ] 5s2 4d10 5p5 or [ 36Kr ] 4d10 5s2 5p5
Electron Dot:
I
4a) What type of element is iodine? nonmetal
b) What type of bond forms between Iodine atoms? Nonmetal to nonmetal = covalent bond = 0 electronegativity difference –
non polar covalent bond
c) Draw an electron dot diagram of the reaction between Iodine atoms.
Electron Dot Diagram of Iodine:
5a) b) c) d)What is the expanded electron configuration of zinc, short hand electron configuration of , electron configuration
of iodine based on the previous noble gas, electron dot diagram of zinc?
1s22s22px22py2 2pz23s23px 23py23pz2 4s23dxy 23dxz23dyz 23dx2-y223dz224px 4py 4pz 5s 4dxy 4dxz 4dyz 4dx2-y2 4dz2 5px 5py 5pz
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p 5s 4d 5p
[ 18Ar ] 4s2 3d10 or [ 18Ar ] 3d10 4s2
Electron Dot: Zn
6a) What type of element is zinc? metal
b) What type of element is iodine? nonmetal
c) What type of bond forms between zinc and iodine? ionic
d) What is the electron dot diagram for the reaction between a zinc atom and an iodine molecule?
7. Draw electron dot reactions for each of the following metal to nonmetal combinations.
a) sodium + bromine
b) lithium + sulfur
c) potassium + nitrogen
d) magnesium + fluorine
e) calcium + oxygen
f) barium + phosphoruous
g) aluminium + chlorine
h) aluminium + oxygen