Question

i need help please : Types of compounds

Argumentation and Documentation Classify each substance as metallic, ionic, molecular or covalent network based on your experimental results and further observations Part I. Testing Conductivity of Substances at Room Temperature Two substances were electrically conducting solids. The only classifications for substances that conduct electricity as solids are metallic or covalent network solids. Use the malleability property of metals to determine the classification of the two substances. Part II. Testing Conductivity of Solutions You tested only three substances for aqueous solution conductivity. Strong conductivity In solution is indicative of only one type of ionic compound, because soluble lonic compounds dissociate into ions. Part III. Testing Conductivity of Pure Liquids Low melting temperatures and liquids that do not conduct electricity are characteristic of molecular substances. Which substances would be classified as molecular substances? Justify each conclusion with at least two properties. Classification Justification 1 Justification 2 Substance Aluminum Ascorbic acid Graphite Paraffin Palmitic add Sodium chloride Sucrose Water Extension Activity is a gas at room temperature and does not conduct electricity. Yet when dissolved in water, the solution becomes an excellent conductor. Classify HCl as metallic, ionic, molecular of covalent network, and explain why HCl would conduct electricity in an aqueous solution

Answer 1

Classifying substance as metallic, ionic, molecular or covalent network based..

1-Metallic-usually metals, having high conductivity towards electricity,ductile and malleable.

In above table

Aluminium is in metallic nature..

2-Ionic- this type of bond occurs in salts having one metal and one non metal elements.they are soluble and dissociative into their ions.. And shows strong conductivity in solutions.

In above table

NaCl is ionic.

3-molecular or covalent network based..

This type of bond occurs between non metals.

They show low conductivity towards electricity having high melting points.

In above table

ASCORBIC ACID also known as vitamin c is possessed covalent network based.and high melting point 190°c and high conductivity towards electricity.(2690-7700 sm–1)

GRAPHITE is also a non metal and it is only non metal that can conduct electricity. Having high melting point .and possessed covalent network based..

PARAFFIN soft colorless solid show low melting point 48°c to 66°c.. Contain non metal hydrocarbon show covalent network.

PALMITIC ACID or hexadecanoic acid also show high melting point and show less conductivity.show molecular or covalent network.

SUCROSE also known as common sugar is also contain non metals as its constituents (c, o, H) and based on covalent based network.

WATER or H2O posses two covalent bond between hydrogen and oxygen show molecular or covalent bond.. High conductivity Toward electricity.