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Itzel Caratachea

11-5-12

Period 1

1

Ionic vs. Covalent Bonding Lab Investigation

Introduction: Covalent and Ionic bonds are two ways to form a bonding between atoms.

Ionic bonds transfer electrons and Covalent bonds share electrons. Ionic bonds arecrystal lattice and Covalent bonds conduct electricity. Both Covalent and Ionic bonds

have full octets to be a full shell and to be stable.

Hypothesis:

Table 1: The expected results of testing five different chemicals

Compounds tobe tested

ChemicalFormula

Hypothesis 1:Ionic or

Covalent

Hypothesis 2:High or Low

Melting Points

Hypothesis 3:Will it conduct

electricityDistilled (pure)

WaterH2O Covalent Low No

SodiumChloride

NaCl Ionic High Yes

Sucrose(sugar)

C12H22O11 Covalent Low No

Dextrose C6H12O6 Covalent Low No

Sodium Sulfate NaSO4 Ionic High Yes

Procedures:

Part I: Melting point and Strength of Bonds

1. Fold aluminum foil into square so that they will fit the ring-stand. Place a smallamount of each of the different compounds on the aluminum foil. Make surenot to mix them up and keep track of them.

2. Place tray on ring stand and heat for no long than 2 min using the Bunsenburner

3. Begin right away recording the observations, keeping track of order in whichthey melt and which ones have a strong bonds or weak.

4. Let the square foil cool, than wash it off.

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Itzel Caratachea

11-5-12

Period 1

3

conduct electricity in water. Ionic bonds are formed from metal Cation and non-metal

anions so this means that when they dissolve in water, electricity can flow through the

solution. Ionic bonds are strong because there structure is a crystal lattice which means

Cations and anions are bonded together and that means they have a strong bond.

Covalent bonds are formed from two negative nonmetals so they dont dissolve in

water.